In order to avoid writing tests that *only* pass in the simulator, but
not on real hardware, do also execute the simulator tests on real
hardware.

R=ahaas@chromium.org, rodolph.perfetta@arm.com

Bug: v8:6947
Change-Id: Ibdf1719fff20e17620c0aaa343d7ea28e48f3837
Reviewed-on: https://chromium-review.googlesource.com/722961
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Rodolph Perfetta <rodolph.perfetta@arm.com>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48706}