eventpoll: Fix dependency check

In the case when one eventpoll in polled by another eventpoll,
we should wait till the polled epoll is opened. So, as the stage
FLE_RESTORED is after FLE_OPEN, it's also OK.

travis-ci: success for eventpoll: Fix dependency check
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

criu/eventpoll.c

@@ -158,7 +158,7 @@ static int epoll_not_ready_tfd(EventpollTfdEntry *tdefe)
 			continue;
 
 		if (fle->desc->ops->type == FD_TYPES__EVENTPOLL)
-			return (fle->stage != FLE_OPEN);
+			return (fle->stage < FLE_OPEN);
 		else
 			return (fle->stage != FLE_RESTORED);
 	}