Add unittest to SDK.

tools/create_sdk.py

 #!/usr/bin/env python
 #
 # Copyright (c) 2011, 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 338 matching lines @@
   dom_dest_dir = join(LIB, 'dom')
   os.makedirs(dom_dest_dir)
 
   copyfile(join(dom_src_dir, 'frog', 'dom_frog.dart'),
            join(dom_dest_dir, 'dom_frog.dart'))
 
   #
   # Create and populate lib/{crypto, json, uri, utf}.
   #
 
-  for library in ['crypto', 'json', 'uri', 'utf']:
+  for library in ['crypto', 'json', 'unittest', 'uri', 'utf']:
     src_dir = join(HOME, 'lib', library)
     dest_dir = join(LIB, library)
     os.makedirs(dest_dir)
 
     for filename in os.listdir(src_dir):
       if filename.endswith('.dart'):
         copyfile(join(src_dir, filename), join(dest_dir, filename))
 
   # Create and populate lib/dartdoc
   dartdoc_src_dir = join(HOME, 'lib', 'dartdoc')
@@ skipping 144 matching lines @@
   if revision is not None:
     with open(os.path.join(SDK_tmp, 'revision'), 'w') as f:
       f.write(revision + '\n')
       f.close()
 
   move(SDK_tmp, SDK)
   utils.Touch(os.path.join(SDK, 'create.stamp'))
 
 if __name__ == '__main__':
   sys.exit(Main(sys.argv))