sched/dl: Do update_rq_clock() in yield_task_dl()

update_curr_dl() needs actual rq clock.
Signed-off-by: NKirill Tkhai <ktkhai@parallels.com>
Signed-off-by: NPeter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1423040972.18770.10.camel@tkhaiSigned-off-by: NIngo Molnar <mingo@kernel.org>

kernel/sched/deadline.c

@@ -912,6 +912,7 @@ static void yield_task_dl(struct rq *rq)
 		rq->curr->dl.dl_yielded = 1;
 		p->dl.runtime = 0;
 	}
+	update_rq_clock(rq);
 	update_curr_dl(rq);
 }