vboot_reference/futility: pipe log level though

Also drop colour support at reviewers request.

BUG=b:203715651
BRANCH=none
TEST=cros deploy to nocturne and ran:
 `/usr/sbin/chromeos-firmwareupdate --mode=recovery --wp=1`.
&& `$ cros_run_unit_tests --board nocturne --packages vboot_reference`.

Signed-off-by: Edward O'Callaghan <quasisec@google.com>
Change-Id: Ie1d1b1e8e304d21ac1df741a3b789cb49ede3556
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/3244680
Commit-Queue: Edward O'Callaghan <quasisec@chromium.org>
Tested-by: Edward O'Callaghan <quasisec@chromium.org>
Reviewed-by: Sam McNally <sammc@chromium.org>
1 file changed