Update vendor/

vendor/golang.org/x/sys/unix/syscall_freebsd.go

@@ -12,7 +12,10 @@
 
 package unix
 
-import "unsafe"
+import (
+	"strings"
+	"unsafe"
+)
 
 // SockaddrDatalink implements the Sockaddr interface for AF_LINK type sockets.
 type SockaddrDatalink struct {
@@ -134,14 +137,7 @@ func setattrlistTimes(path string, times []Timespec, flags int) error {
 // Derive extattr namespace and attribute name
 
 func xattrnamespace(fullattr string) (ns int, attr string, err error) {
-	s := -1
-	for idx, val := range fullattr {
-		if val == '.' {
-			s = idx
-			break
-		}
-	}
-
+	s := strings.IndexByte(fullattr, '.')
 	if s == -1 {
 		return -1, "", ENOATTR
 	}
@@ -482,6 +478,7 @@ func Uname(uname *Utsname) error {
 //sys	Flock(fd int, how int) (err error)
 //sys	Fpathconf(fd int, name int) (val int, err error)
 //sys	Fstat(fd int, stat *Stat_t) (err error)
+//sys	Fstatat(fd int, path string, stat *Stat_t, flags int) (err error)
 //sys	Fstatfs(fd int, stat *Statfs_t) (err error)
 //sys	Fsync(fd int) (err error)
 //sys	Ftruncate(fd int, length int64) (err error)