syscall: fix prototype of Fchflags (API change)
API change, but the old API is obviously wrong.
R=golang-dev, iant, r, rsc
CC=golang-dev
https://golang.org/cl/9157044
diff --git a/src/pkg/syscall/syscall_freebsd.go b/src/pkg/syscall/syscall_freebsd.go
index c7ffe22..9fbcc48 100644
--- a/src/pkg/syscall/syscall_freebsd.go
+++ b/src/pkg/syscall/syscall_freebsd.go
@@ -118,7 +118,7 @@
//sysnb Dup2(from int, to int) (err error)
//sys Exit(code int)
//sys Fchdir(fd int) (err error)
-//sys Fchflags(path string, flags int) (err error)
+//sys Fchflags(fd int, flags int) (err error)
//sys Fchmod(fd int, mode uint32) (err error)
//sys Fchown(fd int, uid int, gid int) (err error)
//sys Flock(fd int, how int) (err error)