On coral devices futility leaves the EC in RO

Add a reboot into the futility.py script in case we lose the ethernet
and don't get it back by the time futility finishes.

BUG=b:331205004
TEST=On leased duts

Change-Id: Ie075e5e209a5288aa1bc959c3f9ddd3113afa57c
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/5545058
Commit-Queue: Kshitij Shah <tij@google.com>
Auto-Submit: Jeremy Bettis <jbettis@chromium.org>
Commit-Queue: Jeremy Bettis <jbettis@chromium.org>
Reviewed-by: Kshitij Shah <tij@google.com>
Tested-by: Jeremy Bettis <jbettis@chromium.org>
4 files changed