Import of https://github.com/ciena/voltctl at commit 40d61fbf3f910ed4017cf67c9c79e8e1f82a33a5

Change-Id: I8464c59e60d76cb8612891db3303878975b5416c
diff --git a/vendor/golang.org/x/sys/windows/mkerrors.go b/vendor/golang.org/x/sys/windows/mkerrors.go
new file mode 100644
index 0000000..a204e6c
--- /dev/null
+++ b/vendor/golang.org/x/sys/windows/mkerrors.go
@@ -0,0 +1,9 @@
+// Copyright 2019 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 generate
+
+package windows
+
+//go:generate ./mkerrors.bash zerrors_windows.go