init: let minijail parent exit

We don't need minijail to monitor us when init can do it.

BUG=None
TEST=restarting cras doesn't leave minijail proc behind

Change-Id: Iccc5f45e9dfa828eeb0f3c647bc018bae1fc8b67
Reviewed-on: https://chromium-review.googlesource.com/395786
Commit-Ready: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Dylan Reid <dgreid@chromium.org>
2 files changed