ct-builder-grid shouldn't change on update

Previously, when sheriff-o-matic updated, the builder chips would re-order
themselves. Now we sort the builder names so they come out in the same order
each time.

R=ojan@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/393953005

git-svn-id: svn://svn.chromium.org/blink/trunk@178210 bbb929c8-8fbe-4397-9dbb-9b2b20218538