[autotest] Add --working and --broken options to dut_status.

The new options will restrict output to hosts that are working
or broken only.

BUG=None
TEST=run the command with the new options

Change-Id: I070489321f03945547c4541f83228f5cfe571a01
Reviewed-on: https://chromium-review.googlesource.com/235415
Tested-by: Richard Barnette <jrbarnette@chromium.org>
Reviewed-by: Dan Shi <dshi@chromium.org>
Commit-Queue: Richard Barnette <jrbarnette@chromium.org>
1 file changed