Fix the warning in gcl to tell people they can use the commit queue.

gcl.py

 #!/usr/bin/env python
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """\
 Wrapper script around Rietveld's upload.py that simplifies working with groups
 of files.
 """
 
@@ skipping 1115 matching lines @@
     filename = line[7:]
     new_cl_files.append((status, filename))
 
   if (not len(change_info.GetFiles()) and not change_info.issue and
       not len(new_description) and not new_cl_files):
     ErrorExit("Empty changelist not saved")
 
   change_info._files = new_cl_files
   change_info.Save()
   if svn_info.get('URL', '').startswith('http:'):
-    Warn("WARNING: Creating CL in a read-only checkout.  You will not be "
-         "able to commit it!")
+    Warn("WARNING: Creating CL in a read-only checkout.  You will need to "
+         "commit using a commit queue!")
 
   print change_info.name + " changelist saved."
   if change_info.MissingTests():
     Warn("WARNING: " + MISSING_TEST_MSG)
 
   # Update the Rietveld issue.
   if change_info.issue and change_info.NeedsUpload():
     change_info.UpdateRietveldDescription()
     change_info.needs_upload = False
     change_info.Save()
@@ skipping 297 matching lines @@
       raise
     print >> sys.stderr, (
         'AppEngine is misbehaving and returned HTTP %d, again. Keep faith '
         'and retry or visit go/isgaeup.\n%s') % (e.code, str(e))
     return 1
 
 
 if __name__ == "__main__":
   fix_encoding.fix_encoding()
   sys.exit(main(sys.argv[1:]))