netlink: dont drop packet but consume it

When we need to clone skb, we dont drop a packet.
Call consume_skb() to not confuse dropwatch.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index faa48f7..da87214 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -866,7 +866,7 @@
 		struct sk_buff *nskb = skb_clone(skb, allocation);
 		if (!nskb)
 			return skb;
-		kfree_skb(skb);
+		consume_skb(skb);
 		skb = nskb;
 	}