[PKT_SCHED] netem: Orphan SKB when adding to queue.

The networking emulator can queue SKBs for a very long
time, so if you're using netem on the sender side for
large bandwidth/delay product testing, the SKB socket
send queue sizes become artificially larger.

Correct this by calling skb_orphan() in netem_enqueue().

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sched/sch_netem.c b/net/sched/sch_netem.c
index 45939ba..ef8874b 100644
--- a/net/sched/sch_netem.c
+++ b/net/sched/sch_netem.c
@@ -170,6 +170,8 @@
 		return NET_XMIT_BYPASS;
 	}
 
+	skb_orphan(skb);
+
 	/*
 	 * If we need to duplicate packet, then re-insert at top of the
 	 * qdisc tree, since parent queuer expects that only one