Add PRESUBMIT.py exclusion for cpplint_chromium.py.

Needed for: http://codereview.chromium.org/7834045/

BUG=none
TEST=Check that cpplint_chromium.py does not trigger presubmit warnings.

Review URL: http://codereview.chromium.org/7789033

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@100025 0039d316-1c4b-4281-b951-d872f2087c98

PRESUBMIT.py

@@ -26,6 +26,7 @@ def CommonChecks(input_api, output_api, tests_to_black_list):
   results.extend(input_api.canned_checks.CheckOwners(input_api, output_api))
   black_list = list(input_api.DEFAULT_BLACK_LIST) + [
       r'^cpplint\.py$',
+      r'^cpplint_chromium\.py$',
       r'^python_bin[\/\\].+',
       r'^svn_bin[\/\\].+',
       r'^tests[\/\\]\w+?[\/\\].+']