Fix function name from last commit

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 305 matching lines @@
       ], [
         ("var pathTo7zip = '../../third_party/7zip/7za.exe';",
          "var pathTo7zip = '7zip/7za.exe';"),
       ])
 
   version = utils.GetVersion()
 
   # Copy dart2js.
   CopyDart2Js(build_dir, SDK_tmp, version)
 
-  revision = utils.GetRevision()
+  revision = utils.GetSVNRevision()
 
   # Write the 'revision' file
   if revision is not None:
     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))