veth: Zero timestamp in xmit path.

This patch zero's the timestamp before handing the packet to
the peer interface.  This lets the peer recalculate the rx timestamp
if it cares about timestamps.
Signed-off-by: NBen Greear <greearb@candelatech.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/veth.c

@@ -171,6 +171,7 @@ static int veth_xmit(struct sk_buff *skb, struct net_device *dev)
 	if (skb->len > (rcv->mtu + MTU_PAD))
 		goto rx_drop;
 
+        skb->tstamp.tv64 = 0;
 	skb->pkt_type = PACKET_HOST;
 	skb->protocol = eth_type_trans(skb, rcv);
 	if (dev->features & NETIF_F_NO_CSUM)