Changes gcl upload to print a reminder that it doesn't do a try.

Review URL: http://codereview.chromium.org/3046011

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@53537 0039d316-1c4b-4281-b951-d872f2087c98

gcl.py

@@ -804,6 +804,8 @@ def CMDupload(change_info, args):
   # consistent.
   os.chdir(previous_cwd)
 
+  print "*** Upload does not submit a try; use gcl try to submit a try. ***"
+
   return 0