Rearranges the polymer package now that the old compiler is gone.

pkg/polymer/test/build/common.dart

 // Copyright (c) 2013, 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.
 
-library polymer.test.transfom.common;
+library polymer.test.build.common;
 
 import 'dart:async';
 
 import 'package:barback/barback.dart';
 import 'package:stack_trace/stack_trace.dart';
 import 'package:unittest/unittest.dart';
 
 String idToString(AssetId id) => '${id.package}|${id.path}';
 AssetId idFromString(String s) {
   int index = s.indexOf('|');
@@ skipping 86 matching lines @@
 }
 
 // TODO(jmesserly): this is .debug to workaround issue 13046.
 const SHADOW_DOM_TAG =
     '<script src="packages/shadow_dom/shadow_dom.debug.js"></script>\n';
 
 const INTEROP_TAG = '<script src="packages/browser/interop.js"></script>\n';
 
 const PKG_JS_INTEROP_TAG =
     '<script src="packages/js/dart_interop.js"></script>\n';