runtime, syscall: update for openbsd system ABI break

Update Go so that it continues to work past the OpenBSD system ABI
break, with 64-bit time_t:

  http://www.openbsd.org/faq/current.html#20130813

Note: this makes OpenBSD 5.5 (currently 5.4-current) the minimum
supported release for Go.

Fixes #7049.

R=golang-codereviews, mikioh.mikioh
CC=golang-codereviews
https://golang.org/cl/13368046
diff --git a/src/pkg/syscall/zerrors_openbsd_amd64.go b/src/pkg/syscall/zerrors_openbsd_amd64.go
index 411b51a..c480bab 100644
--- a/src/pkg/syscall/zerrors_openbsd_amd64.go
+++ b/src/pkg/syscall/zerrors_openbsd_amd64.go
@@ -140,10 +140,8 @@
 	BPF_W                             = 0x0
 	BPF_X                             = 0x8
 	BRKINT                            = 0x2
-	CCR0_FLUSH                        = 0x10
 	CFLUSH                            = 0xf
 	CLOCAL                            = 0x8000
-	CPUID_CFLUSH                      = 0x80000
 	CREAD                             = 0x800
 	CS5                               = 0x0
 	CS6                               = 0x100
@@ -198,13 +196,7 @@
 	ECHOKE                            = 0x1
 	ECHONL                            = 0x10
 	ECHOPRT                           = 0x20
-	EFER_LMA                          = 0x400
-	EFER_LME                          = 0x100
-	EFER_NXE                          = 0x800
-	EFER_SCE                          = 0x1
 	EMT_TAGOVF                        = 0x1
-	EMUL_ENABLED                      = 0x1
-	EMUL_NATIVE                       = 0x2
 	ENDRUNDISC                        = 0x9
 	ETHERMIN                          = 0x2e
 	ETHERMTU                          = 0x5dc
@@ -450,7 +442,6 @@
 	IEXTEN                            = 0x400
 	IFAN_ARRIVAL                      = 0x0
 	IFAN_DEPARTURE                    = 0x1
-	IFA_ROUTE                         = 0x1
 	IFF_ALLMULTI                      = 0x200
 	IFF_BROADCAST                     = 0x2
 	IFF_CANTCHANGE                    = 0x8e52
@@ -719,6 +710,8 @@
 	IPPROTO_AH                        = 0x33
 	IPPROTO_CARP                      = 0x70
 	IPPROTO_DIVERT                    = 0x102
+	IPPROTO_DIVERT_INIT               = 0x2
+	IPPROTO_DIVERT_RESP               = 0x1
 	IPPROTO_DONE                      = 0x101
 	IPPROTO_DSTOPTS                   = 0x3c
 	IPPROTO_EGP                       = 0x8
@@ -763,7 +756,6 @@
 	IPV6_DSTOPTS                      = 0x32
 	IPV6_ESP_NETWORK_LEVEL            = 0x37
 	IPV6_ESP_TRANS_LEVEL              = 0x36
-	IPV6_FAITH                        = 0x1d
 	IPV6_FLOWINFO_MASK                = 0xffffff0f
 	IPV6_FLOWLABEL_MASK               = 0xffff0f00
 	IPV6_FRAGTTL                      = 0x78
@@ -780,7 +772,6 @@
 	IPV6_MULTICAST_IF                 = 0x9
 	IPV6_MULTICAST_LOOP               = 0xb
 	IPV6_NEXTHOP                      = 0x30
-	IPV6_OPTIONS                      = 0x1
 	IPV6_PATHMTU                      = 0x2c
 	IPV6_PIPEX                        = 0x3f
 	IPV6_PKTINFO                      = 0x2e
@@ -789,6 +780,7 @@
 	IPV6_PORTRANGE_HIGH               = 0x1
 	IPV6_PORTRANGE_LOW                = 0x2
 	IPV6_RECVDSTOPTS                  = 0x28
+	IPV6_RECVDSTPORT                  = 0x40
 	IPV6_RECVHOPLIMIT                 = 0x25
 	IPV6_RECVHOPOPTS                  = 0x27
 	IPV6_RECVPATHMTU                  = 0x2b
@@ -799,9 +791,7 @@
 	IPV6_RTHDR                        = 0x33
 	IPV6_RTHDRDSTOPTS                 = 0x23
 	IPV6_RTHDR_LOOSE                  = 0x0
-	IPV6_RTHDR_STRICT                 = 0x1
 	IPV6_RTHDR_TYPE_0                 = 0x0
-	IPV6_SOCKOPT_RESERVED1            = 0x3
 	IPV6_TCLASS                       = 0x3d
 	IPV6_UNICAST_HOPS                 = 0x4
 	IPV6_USE_MIN_MTU                  = 0x2a
@@ -813,6 +803,7 @@
 	IP_DEFAULT_MULTICAST_LOOP         = 0x1
 	IP_DEFAULT_MULTICAST_TTL          = 0x1
 	IP_DF                             = 0x4000
+	IP_DIVERTFL                       = 0x1022
 	IP_DROP_MEMBERSHIP                = 0xd
 	IP_ESP_NETWORK_LEVEL              = 0x16
 	IP_ESP_TRANS_LEVEL                = 0x15
@@ -932,7 +923,6 @@
 	PARODD                            = 0x2000
 	PENDIN                            = 0x20000000
 	PF_FLUSH                          = 0x1
-	PMC5_PIPELINE_FLUSH               = 0x15
 	PRIO_PGRP                         = 0x1
 	PRIO_PROCESS                      = 0x0
 	PRIO_USER                         = 0x2
@@ -972,7 +962,7 @@
 	RTF_CLONING                       = 0x100
 	RTF_DONE                          = 0x40
 	RTF_DYNAMIC                       = 0x10
-	RTF_FMASK                         = 0xf808
+	RTF_FMASK                         = 0x10f808
 	RTF_GATEWAY                       = 0x2
 	RTF_HOST                          = 0x4
 	RTF_LLINFO                        = 0x400
@@ -1007,7 +997,7 @@
 	RTM_REDIRECT                      = 0x6
 	RTM_RESOLVE                       = 0xb
 	RTM_RTTUNIT                       = 0xf4240
-	RTM_VERSION                       = 0x4
+	RTM_VERSION                       = 0x5
 	RTV_EXPIRE                        = 0x4
 	RTV_HOPCOUNT                      = 0x2
 	RTV_MTU                           = 0x1
@@ -1033,7 +1023,7 @@
 	SIOCBRDGADD                       = 0x8058693c
 	SIOCBRDGADDS                      = 0x80586941
 	SIOCBRDGARL                       = 0x806e694d
-	SIOCBRDGDADDR                     = 0x80286947
+	SIOCBRDGDADDR                     = 0x81286947
 	SIOCBRDGDEL                       = 0x8058693d
 	SIOCBRDGDELS                      = 0x80586942
 	SIOCBRDGFLUSH                     = 0x80586948
@@ -1050,7 +1040,7 @@
 	SIOCBRDGGTO                       = 0xc0146946
 	SIOCBRDGIFS                       = 0xc0586942
 	SIOCBRDGRTS                       = 0xc0206943
-	SIOCBRDGSADDR                     = 0xc0286944
+	SIOCBRDGSADDR                     = 0xc1286944
 	SIOCBRDGSCACHE                    = 0x80146940
 	SIOCBRDGSFD                       = 0x80146952
 	SIOCBRDGSHT                       = 0x80146951
@@ -1073,6 +1063,7 @@
 	SIOCGETPFSYNC                     = 0xc02069f8
 	SIOCGETSGCNT                      = 0xc0207534
 	SIOCGETVIFCNT                     = 0xc0287533
+	SIOCGETVLAN                       = 0xc0206990
 	SIOCGHIWAT                        = 0x40047301
 	SIOCGIFADDR                       = 0xc0206921
 	SIOCGIFASYNCMAP                   = 0xc020697c
@@ -1083,9 +1074,9 @@
 	SIOCGIFDSTADDR                    = 0xc0206922
 	SIOCGIFFLAGS                      = 0xc0206911
 	SIOCGIFGATTR                      = 0xc028698b
-	SIOCGIFGENERIC                    = 0xc020693a
 	SIOCGIFGMEMB                      = 0xc028698a
 	SIOCGIFGROUP                      = 0xc0286988
+	SIOCGIFHARDMTU                    = 0xc02069a5
 	SIOCGIFMEDIA                      = 0xc0306936
 	SIOCGIFMETRIC                     = 0xc0206917
 	SIOCGIFMTU                        = 0xc020697e
@@ -1100,9 +1091,12 @@
 	SIOCGLIFADDR                      = 0xc218691d
 	SIOCGLIFPHYADDR                   = 0xc218694b
 	SIOCGLIFPHYRTABLE                 = 0xc02069a2
+	SIOCGLIFPHYTTL                    = 0xc02069a9
 	SIOCGLOWAT                        = 0x40047303
 	SIOCGPGRP                         = 0x40047309
+	SIOCGSPPPPARAMS                   = 0xc0206994
 	SIOCGVH                           = 0xc02069f6
+	SIOCGVNETID                       = 0xc02069a7
 	SIOCIFCREATE                      = 0x8020697a
 	SIOCIFDESTROY                     = 0x80206979
 	SIOCIFGCLONERS                    = 0xc0106978
@@ -1110,6 +1104,7 @@
 	SIOCSETLABEL                      = 0x80206999
 	SIOCSETPFLOW                      = 0x802069fd
 	SIOCSETPFSYNC                     = 0x802069f7
+	SIOCSETVLAN                       = 0x8020698f
 	SIOCSHIWAT                        = 0x80047300
 	SIOCSIFADDR                       = 0x8020690c
 	SIOCSIFASYNCMAP                   = 0x8020697d
@@ -1118,7 +1113,6 @@
 	SIOCSIFDSTADDR                    = 0x8020690e
 	SIOCSIFFLAGS                      = 0x80206910
 	SIOCSIFGATTR                      = 0x8028698c
-	SIOCSIFGENERIC                    = 0x80206939
 	SIOCSIFLLADDR                     = 0x8020691f
 	SIOCSIFMEDIA                      = 0xc0206935
 	SIOCSIFMETRIC                     = 0x80206918
@@ -1132,9 +1126,12 @@
 	SIOCSIFXFLAGS                     = 0x8020699d
 	SIOCSLIFPHYADDR                   = 0x8218694a
 	SIOCSLIFPHYRTABLE                 = 0x802069a1
+	SIOCSLIFPHYTTL                    = 0x802069a8
 	SIOCSLOWAT                        = 0x80047302
 	SIOCSPGRP                         = 0x80047308
+	SIOCSSPPPPARAMS                   = 0x80206993
 	SIOCSVH                           = 0xc02069f5
+	SIOCSVNETID                       = 0x802069a6
 	SOCK_DGRAM                        = 0x2
 	SOCK_RAW                          = 0x3
 	SOCK_RDM                          = 0x4
@@ -1177,6 +1174,7 @@
 	TCP_MD5SIG                        = 0x4
 	TCP_MSS                           = 0x200
 	TCP_NODELAY                       = 0x1
+	TCP_NOPUSH                        = 0x10
 	TCP_NSTATES                       = 0xb
 	TCP_SACK_ENABLE                   = 0x8
 	TCSAFLUSH                         = 0x2
@@ -1196,6 +1194,7 @@
 	TIOCGETD                          = 0x4004741a
 	TIOCGFLAGS                        = 0x4004745d
 	TIOCGPGRP                         = 0x40047477
+	TIOCGSID                          = 0x40047463
 	TIOCGTSTAMP                       = 0x4010745b
 	TIOCGWINSZ                        = 0x40087468
 	TIOCMBIC                          = 0x8004746b