Add the repo tool which is going to be used for iterative tasks across multiple git repos

Review URL: http://codereview.chromium.org/2792012

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@52240 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed