Add autoupdate_Rollback test to the bvts.

BUG=chromium:260468
TEST=Verified test showed up in suite enumerator.

Change-Id: Ic11bdd36c5fa5bc7eca9a98e0c28aafb2fd4a0cc
Reviewed-on: https://chromium-review.googlesource.com/174314
Tested-by: Chris Sosa <sosa@chromium.org>
Reviewed-by: Alex Deymo <deymo@chromium.org>
Commit-Queue: Chris Sosa <sosa@chromium.org>
1 file changed