vendor: update golang.org/x/sys for aix/ppc64 fix

This pulls in CL 179317 which fixes the build on aix/ppc64.

Change-Id: I7d90950800627904503db97cfb0bc670a45b701e
Reviewed-on: https://go-review.googlesource.com/c/go/+/179357
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
diff --git a/src/go.mod b/src/go.mod
index 2853049..d7d707c 100644
--- a/src/go.mod
+++ b/src/go.mod
@@ -5,6 +5,6 @@
 require (
 	golang.org/x/crypto v0.0.0-20190513172903-22d7a77e9e5f
 	golang.org/x/net v0.0.0-20190514140710-3ec191127204
-	golang.org/x/sys v0.0.0-20190528183647-3626398d7749 // indirect
+	golang.org/x/sys v0.0.0-20190529130038-5219a1e1c5f8 // indirect
 	golang.org/x/text v0.3.2 // indirect
 )
diff --git a/src/go.sum b/src/go.sum
index ff3ed35..c0f012c 100644
--- a/src/go.sum
+++ b/src/go.sum
@@ -8,6 +8,8 @@
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190528183647-3626398d7749 h1:oG2HS+e2B9VqK95y67B5MgJIJhOPY27/m5uJKJhHzus=
 golang.org/x/sys v0.0.0-20190528183647-3626398d7749/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190529130038-5219a1e1c5f8 h1:2WjIC11WRITGlVWmyLXKjzIVj1ZwoWZ//tadeUUV6/o=
+golang.org/x/sys v0.0.0-20190529130038-5219a1e1c5f8/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.2 h1:tW2bmiBqwgJj/UpqtC8EpXEZVYOwU0yG4iWbprSVAcs=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
diff --git a/src/vendor/golang.org/x/sys/cpu/syscall_aix_ppc64_gc.go b/src/vendor/golang.org/x/sys/cpu/syscall_aix_ppc64_gc.go
index 15a8b85..78fe25e 100644
--- a/src/vendor/golang.org/x/sys/cpu/syscall_aix_ppc64_gc.go
+++ b/src/vendor/golang.org/x/sys/cpu/syscall_aix_ppc64_gc.go
@@ -18,6 +18,8 @@
 
 //go:cgo_import_dynamic libc_getsystemcfg getsystemcfg "libc.a/shr_64.o"
 
+//go:linkname libc_getsystemcfg libc_getsystemcfg
+
 type syscallFunc uintptr
 
 var libc_getsystemcfg syscallFunc
diff --git a/src/vendor/modules.txt b/src/vendor/modules.txt
index 6f64ac7..b7a9006 100644
--- a/src/vendor/modules.txt
+++ b/src/vendor/modules.txt
@@ -16,7 +16,7 @@
 golang.org/x/net/lif
 golang.org/x/net/nettest
 golang.org/x/net/route
-# golang.org/x/sys v0.0.0-20190528183647-3626398d7749
+# golang.org/x/sys v0.0.0-20190529130038-5219a1e1c5f8
 golang.org/x/sys/cpu
 # golang.org/x/text v0.3.2
 golang.org/x/text/secure/bidirule