Change gae to apache 2 license.

service/datastore/serialize/invertible.go

Index: service/datastore/serialize/invertible.go
diff --git a/service/datastore/serialize/invertible.go b/service/datastore/serialize/invertible.go
index b71f96b511a13806736256415a5ef3efa5b0db33..1c798e13ae0dc712dff6096c0fe1faa86bcb060f 100644
--- a/service/datastore/serialize/invertible.go
+++ b/service/datastore/serialize/invertible.go
@@ -1,6 +1,6 @@
-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
+// Copyright 2015 The LUCI Authors. All rights reserved.
+// Use of this source code is governed under the Apache License, Version 2.0
+// that can be found in the LICENSE file.
 
 package serialize