Add failed builders to sheriff-o-matic.

This displays the non-layout builders and their failed steps at the top.

I am having trouble with ct-failing-builders-tests.html...

R=abarth@chromium.org,ojan@chromium.org,esprehn@chromium.org
CC=team-ojan@chromium.org

Review URL: https://codereview.chromium.org/371133003

git-svn-id: svn://svn.chromium.org/blink/trunk@178231 bbb929c8-8fbe-4397-9dbb-9b2b20218538