[SOCK]: Shrink struct sock by 8 bytes on 64-bit.

	atomic_t		sk_rmem_alloc;

	atomic_t		sk_wmem_alloc;

	atomic_t		sk_omem_alloc;

	int			sk_sndbuf;

	struct sk_buff_head	sk_receive_queue;

	struct sk_buff_head	sk_write_queue;

	struct sk_buff_head	sk_async_wait_queue;

	int			sk_wmem_queued;

	int			sk_forward_alloc;

	gfp_t			sk_allocation;

	int			sk_sndbuf;

	int			sk_route_caps;

	int			sk_gso_type;

	int			sk_rcvlowat;