create_sdk should not copy packages directories for things under pkg

tools/create_sdk.py

 #!/usr/bin/env python
 #
 # 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.
 #
 # A script which will be invoked from gyp to create an SDK.
 #
 # Usage: create_sdk.py sdk_directory
 #
@@ skipping 205 matching lines @@
   os.makedirs(PKG)
 
   #
   # Create and populate pkg/{args, intl, logging, meta, unittest, ...}
   #
 
   for library in ['args', 'http', 'intl', 'logging',
                   'meta', 'oauth2', 'unittest']:
     copytree(join(HOME, 'pkg', library), join(PKG, library),
              ignore=ignore_patterns('*.svn', 'doc', 'docs',
-                                    '*.py', '*.gypi', '*.sh'))
+                                    '*.py', '*.gypi', '*.sh', 'packages'))
 
   # Create and copy tools.
   UTIL = join(SDK_tmp, 'util')
   os.makedirs(UTIL)
 
   if ShouldCopyAnalyzer():
     # Create and copy Analyzer library into 'util'
     ANALYZER_DEST = join(UTIL, 'analyzer')
     os.makedirs(ANALYZER_DEST)
 
@@ skipping 70 matching lines @@
     with open(os.path.join(SDK_tmp, 'revision'), 'w') as f:
       f.write(revision + '\n')
       f.close()
 
   Copy(join(HOME, 'README.dart-sdk'), join(SDK_tmp, 'README'))
 
   move(SDK_tmp, SDK)
 
 if __name__ == '__main__':
   sys.exit(Main(sys.argv))