fix build

Also: Copyright notices only need the year the file was created.

R=rsc
CC=golang-dev, krasin
https://golang.org/cl/2021041

src/pkg/syscall/syscall_bsd.go

-// Copyright 2009,2010 The Go Authors. All rights reserved.
+// Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
@@ -324,7 +324,7 @@ func Socket(domain, typ, proto int) (fd, errno int) {
 }
 
 func Socketpair(domain, typ, proto int) (fd [2]int, errno int) {
-	errno = socketpair(domain, typ, proto, &fd)
+	fd, errno = socketpair(domain, typ, proto)
 	return
 }