Fix a bug in git_cl/PRESUBMIT.py causing it to fail.

When I renamed setup_mock to local_rietveld, I had forgot one place in
PRESUBMIT.py.

TBR=evan
BUG=none
TEST=none

Review URL: http://codereview.chromium.org/6501001

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@74627 0039d316-1c4b-4281-b951-d872f2087c98

git_cl/PRESUBMIT.py

@@ -63,7 +63,7 @@ def RunTests(input_api, output_api):
       proc.communicate()
       if proc.returncode != 0:
         output.append(output_api.PresubmitError('%s failed' % test))
-  except setup_mock.Failure, e:
+  except local_rietveld.Failure, e:
     output.append(output_api.PresubmitError('\n'.join(str(i) for i in e.args)))
   finally:
     server.stop_server()