Skip subprocess2_test suite on upload.

This suite is very slow (26s), while the rest of the test suites
are fast.. Since subprocess2 is a relatively static module,
blacklist the suite for upload.


Review URL: https://chromiumcodereview.appspot.com/12544027

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@188657 0039d316-1c4b-4281-b951-d872f2087c98

PRESUBMIT.py

@@ -96,6 +96,7 @@ def CheckChangeOnUpload(input_api, output_api):
       r'^checkout_test\.py$',
       r'^gclient_smoketest\.py$',
       r'^scm_unittest\.py$',
+      r'^subprocess2_test\.py$',
     ]
   return CommonChecks(input_api, output_api, tests_to_black_list)