syscall: Use vsyscall for syscall.Gettimeofday and .Time on linux amd64.
Regenerate zsyscall_linux_*.go files with recent changes to
mksyscall.sh.
Add socketpair to syscall_linux_amd64.go; for some reason it
was in the generated file but not in the source file.
R=rsc, r2
CC=golang-dev
https://golang.org/cl/2190044
diff --git a/src/pkg/syscall/syscall_linux_arm.go b/src/pkg/syscall/syscall_linux_arm.go
index 3b4573e..e3c1c03 100644
--- a/src/pkg/syscall/syscall_linux_arm.go
+++ b/src/pkg/syscall/syscall_linux_arm.go
@@ -58,6 +58,10 @@
//sys Stat(path string, stat *Stat_t) (errno int) = SYS_STAT64
//sys Statfs(path string, buf *Statfs_t) (errno int) = SYS_STATFS64
+// Vsyscalls on amd64.
+//sys Gettimeofday(tv *Timeval) (errno int)
+//sys Time(t *Time_t) (tt Time_t, errno int)
+
// TODO(kaib): add support for tracing
func (r *PtraceRegs) PC() uint64 { return 0 }
