sctp_status: server side should also receive msg_cnt times

As client side send msg_cnt times for each repeat. Server will exit too early
if we only receive one time for each repeat and leave client keep sent, which
makes client could not exit normally.

Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>