libgo: update to Go 1.11

    
    Reviewed-on: https://go-review.googlesource.com/136435

gotools/:
	* Makefile.am (mostlyclean-local): Run chmod on check-go-dir to
	make sure it is writable.
	(check-go-tools): Likewise.
	(check-vet): Copy internal/objabi to check-vet-dir.
	* Makefile.in: Rebuild.

From-SVN: r264546

1 files changed, 16 insertions, 0 deletions

diff --git a/libgo/go/net/error_unix.go b/libgo/go/net/error_unix.go
new file mode 100644
index 0000000..b5a5829
--- /dev/null
+++ b/libgo/go/net/error_unix.go
@@ -0,0 +1,16 @@
+// Copyright 2018 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.
+
+// +build darwin dragonfly freebsd js linux netbsd openbsd solaris
+
+package net
+
+import "syscall"
+
+func isConnError(err error) bool {
+	if se, ok := err.(syscall.Errno); ok {
+		return se == syscall.ECONNRESET || se == syscall.ECONNABORTED
+	}
+	return false
+}