Add missing "start" event back for auto-restart container

When container is automatically restarted based on restart policy,
docker events can't get "start" event but only get "die" event, this is
not consistent with previous behavior. This commit will add "start"
event back.

Signed-off-by: Zhang Wei <zhangwei555@huawei.com>
(cherry picked from commit fdfaaeb9aa72404bde5207510bf5910893414b5d)