Add @proxy to annotations.dart - remove package:meta.

pkg/polymer/lib/component_build.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /** This library is deprecated. Please use `builder.dart` instead. */
 @deprecated
 library build_utils;
 
 import 'dart:async';
-import 'package:meta/meta.dart';
 
 import 'builder.dart' as builder;
 
 /**
  * This function is deprecated. Please use `build` from `builder.dart`
  * instead.
  */
 @deprecated
 Future build(List<String> arguments, List<String> entryPoints,
     {bool printTime: true, bool shouldPrint: true}) {
   return builder.build(
       entryPoints: entryPoints, options: builder.parseOptions(arguments));
 }