Merge 3.18.8 into android-3.18

Changes in 3.18.8:
	ip: zero sockaddr returned on error queue
	net: rps: fix cpu unplug
	ipv6: stop sending PTB packets for MTU < 1280
	netxen: fix netxen_nic_poll() logic
	net: sctp: fix slab corruption from use after free on INIT collisions
	ipv4: try to cache dst_entries which would cause a redirect
	udp_diag: Fix socket skipping within chain
	ping: Fix race in free in receive path
	ipv6: replacing a rt6_info needs to purge possible propagated rt6_infos too
	bnx2x: fix napi poll return value for repoll
	net: don't OOPS on socket aio
	bridge: dont send notification when skb->len == 0 in rtnl_bridge_notify
	tcp: ipv4: initialize unicast_sock sk_pacing_rate
	ipv4: tcp: get rid of ugly unicast_sock
	ppp: deflate: never return len larger than output buffer
	net: sctp: fix passing wrong parameter header to param_type2af in sctp_process_param
	hyperv: Fix the error processing in netvsc_send()
	net: sched: fix panic in rate estimators
	ext4: ignore journal checksum on remount; don't fail
	media/rc: Send sync space information on the lirc device
	Linux 3.18.8

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>