Fix incorrect patch path due to Chromuum update.

git-svn-id: http://chromiumembedded.googlecode.com/svn/trunk/cef3@1328 5089003a-bbd8-11dd-ad1f-f1f9622dbc98
Fix revision.py detection of git checkouts

git-svn-id: http://chromiumembedded.googlecode.com/svn/trunk/cef3@1329 5089003a-bbd8-11dd-ad1f-f1f9622dbc98
Fix script detection of git checkouts

git-svn-id: http://chromiumembedded.googlecode.com/svn/trunk/cef3@1330 5089003a-bbd8-11dd-ad1f-f1f9622dbc98