runtime: add missing copyright header to signal_windows_test.go

The file was added in CL 181839 which was submitted in 2019.

Also delete the superfluous //go:build windows build constraint which is
already part of the file name.

Change-Id: Iecdf3d75848a7b8e2a76cd18c9fff4fb90acdac2
Reviewed-on: https://go-review.googlesource.com/c/go/+/427854
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>

diff --git a/src/runtime/signal_windows_test.go b/src/runtime/signal_windows_test.go
index add23cd2926996a03e7d559eac87dca788352c81..731f22da61b7787cfb192589eebdc9660d260dc8 100644 (file)
--- a/src/runtime/signal_windows_test.go
+++ b/src/runtime/signal_windows_test.go
@@ -1,4 +1,6 @@
-//go:build windows
+// 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.
 
 package runtime_test