cbuildbot - Make 'repo sync' less quiet.

This will give the users of trybot more feedback about the execution of
trybot.  Also, since buildbots now break output into stages in the
waterfall, we can be a bit more verbose during sync.

BUG=None
TEST=Ran trybot.

Integration from TOT.

Change-Id: I94868ce4751435243ba103daeb6677f779f151fa
Reviewed-on: http://gerrit.chromium.org/gerrit/6972
Reviewed-by: Chris Sosa <sosa@chromium.org>
Tested-by: Ryan Cui <rcui@chromium.org>
Reviewed-on: http://gerrit.chromium.org/gerrit/7216
1 file changed