Change gae to apache 2 license.

impl/prod/logger.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 prod
 
 import (
         "fmt"
 
         "github.com/luci/luci-go/common/logging"
         "golang.org/x/net/context"
         "google.golang.org/appengine/log"
 )
@@ skipping 45 matching lines @@
                 logf = log.Errorf
         }
 
         fields := logging.GetFields(gl.ic)
         if len(fields) > 0 {
                 logf(gl.aeCtx, "%s :: %s", fmt.Sprintf(format, args...), fields.String())
         } else {
                 logf(gl.aeCtx, format, args...)
         }
 }