cashew: minijail -> minijail0

BUG=chromium-os:383
TESTED_ON=kaen
TEST=Adhoc
Built, booted, ps aux | grep cashew

Change-Id: I32ec90e1f7b41a66b14193593828d0369332e27e
Signed-off-by: Elly Jones <ellyjones@chromium.org>
Reviewed-on: http://gerrit.chromium.org/gerrit/8152
Reviewed-by: Vince Laviano <vlaviano@chromium.org>