Change gae to apache 2 license.

service/datastore/query.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 datastore
 
 import (
         "bytes"
         "fmt"
         "sort"
         "strings"
         "sync"
 
@@ skipping 749 matching lines @@
         if q.keysOnly {
                 p("KeysOnly")
         }
 
         if _, err := ret.WriteRune(')'); err != nil {
                 panic(err)
         }
 
         return ret.String()
 }