Update cpplint.py to r136.

The only difference compared to upstream[1] is the shebang line from
depot_tools.

[1] https://code.google.com/p/google-styleguide/source/browse/trunk/cpplint/cpplint.py?r=136

BUG=None

Review URL: https://codereview.chromium.org/460003003

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@288783 0039d316-1c4b-4281-b951-d872f2087c98