CrossOver lib: Collect UART logs for -eng image.

There is a new feature where if some errors happen on -userdebug,
developer can run the same test on -eng image on demand from ATP UI.

Since UART logs are supported only for -eng image, it make sense to
collect them.

AL Brya with userdebug https://ci.chromium.org/b/8724371636948185361
AL Brya with -eng :  https://ci.chromium.org/b/8724371793874555985
AL Dedede satlab -userdebug: https://ci.chromium.org/b/8724372027152990913
Brya Al->CROS install on satlab: https://ci.chromium.org/ui/p/chromeos/builders/test_runner.shadow/test_runner/b8724283231857498641/overview

The eng one, will have the uart logs printed.
BUG=None
TEST=See above

Change-Id: Icb7951c03052a28885534b5312953f6235634a62
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/6214755
Tested-by: Julio Hurtado <juahurta@google.com>
Auto-Submit: Kshitij Pancholi <panchok@google.com>
Commit-Queue: Julio Hurtado <juahurta@google.com>
Reviewed-by: Tomasz Nowicki <tnowicki@google.com>
Reviewed-by: Azizur Rahman <azrahman@google.com>
Reviewed-by: Chris DeLaGarza <cdelagarza@google.com>
3 files changed