netfilter: ctnetlink: include conntrack status in destroy event message

When a conntrack is destroyed, the connection status does not get
exported to netlink. I don't see a reason for not doing so. This patch
exports the status on all conntrack events.

Signed-off-by: Fabian Hugelshofer <hugelshofer2006@gmx.ch>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>