Change gae to apache 2 license.

service/datastore/serialize/binary_tools.go

-// 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
 
 import (
         "bytes"
 )
 
 // Join is a convenience invocation of bytes.Join(itms, nil)
 func Join(itms ...[]byte) []byte {
         return bytes.Join(itms, nil)
@@ skipping 20 matching lines @@
         for i := len(ret) - 1; i >= 0; i-- {
                 if ret[i] == 0xFF {
                         ret[i] = 0
                 } else {
                         ret[i]++
                         return ret, false
                 }
         }
         return ret, true
 }