trychange.py hotfix

Should use e.message instead of e.reason, where e is an Exception

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@270473 0039d316-1c4b-4281-b951-d872f2087c98

trychange.py

@@ -771,7 +771,7 @@ def _SendChangeGerrit(bot_spec, options):
                               labels={'Tryjob-Request': 1})
       except gerrit_util.GerritError, e:
         if e.http_status == 400:
-          raise Error(e.reason)
+          raise Error(e.message)
         else:
           raise