Only set --cc when it's the first upload.

BUG=none
TEST=second git-cl upload of a CL doesn't set CC again
Review URL: http://codereview.chromium.org/6546042

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@75531 0039d316-1c4b-4281-b951-d872f2087c98

git_cl/git_cl.py

@@ -751,7 +751,6 @@ def CMDupload(parser, args):
   upload_args.extend(['--server', cl.GetRietveldServer()])
   if options.reviewers:
     upload_args.extend(['--reviewers', options.reviewers])
-  upload_args.extend(['--cc', settings.GetCCList()])
   if options.emulate_svn_auto_props:
     upload_args.append('--emulate_svn_auto_props')
   if options.send_mail:
@@ -794,6 +793,7 @@ def CMDupload(parser, args):
       return 1
     upload_args.extend(['--message', subject])
     upload_args.extend(['--description', change_desc])
+    upload_args.extend(['--cc', settings.GetCCList()])
 
   # Include the upstream repo's URL in the change -- this is useful for
   # projects that have their source spread across multiple repos.