Send SIGTERM when exiting to allow for proper cleanup.

BUG=chromium:217162
TEST=Sanity check by start/stop cromo, connect/disconnect modem

Change-Id: I60c85bab1fbd41e28be21e99da26ee2c6140f13e
Reviewed-on: https://gerrit.chromium.org/gerrit/57005
Commit-Queue: Thieu Le <thieule@chromium.org>
Reviewed-by: Thieu Le <thieule@chromium.org>
Tested-by: Thieu Le <thieule@chromium.org>
1 file changed