Log the device MAC addresses in the test.

BUG=chromium-os:38366
TEST=Ran it

Change-Id: Ib7a53d91c52e305793aecc007b185cf25af2dcf8
Reviewed-on: https://gerrit.chromium.org/gerrit/42681
Reviewed-by: Kris Rambish <krisr@chromium.org>
Tested-by: Kris Rambish <krisr@chromium.org>
1 file changed