Revert "Parts must start with 'part of'" and "Attempt to fix VM build"

dart/pkg/args/lib/src/utils.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.
 
 // TODO(rnystrom): This file was copied from pub.
 /** Generic utility functions. Stuff that should possibly be in core. */
-library args_utils;
+#library('args_utils');
 
 /** Pads [source] to [length] by adding spaces at the end. */
 String padRight(String source, int length) {
   final result = new StringBuffer();
   result.add(source);
 
   while (result.length < length) {
     result.add(' ');
   }
 
   return result.toString();
 }