GitLab

This is a clean rewrite of ajwong@'s add-gdb-index script.

BUG=NONE


Review URL: https://chromiumcodereview.appspot.com/10843037

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@149791 0039d316-1c4b-4281-b951-d872f2087c98