crossover provision: add keepawake signals, fix OS detection check. add log when failure

BUG=None
TEST=leds

Change-Id: I834831068b058090685056fe757968bbb6180ce5
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/5923830
Commit-Queue: Derek Beckett <dbeckett@chromium.org>
Tested-by: Derek Beckett <dbeckett@chromium.org>
Reviewed-by: Kshitij Pancholi <panchok@google.com>
3 files changed