net/sched: act_ct: add miss tcf_lastuse_update.

When tcf_ct_act execute the tcf_lastuse_update should
be update or the used stats never update

filter protocol ip pref 3 flower chain 0
filter protocol ip pref 3 flower chain 0 handle 0x1
  eth_type ipv4
  dst_ip 1.1.1.1
  ip_flags frag/firstfrag
  skip_hw
  not_in_hw
 action order 1: ct zone 1 nat pipe
  index 1 ref 1 bind 1 installed 103 sec used 103 sec
 Action statistics:
 Sent 151500 bytes 101 pkt (dropped 0, overlimits 0 requeues 0)
 backlog 0b 0p requeues 0
 cookie 4519c04dc64a1a295787aab13b6a50fb
Signed-off-by: wenxu <wenxu@ucloud.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/sched/act_ct.c

@@ -925,6 +925,8 @@ static int tcf_ct_act(struct sk_buff *skb, const struct tc_action *a,
 	force = p->ct_action & TCA_CT_ACT_FORCE;
 	tmpl = p->tmpl;
 
+	tcf_lastuse_update(&c->tcf_tm);
+
 	if (clear) {
 		ct = nf_ct_get(skb, &ctinfo);
 		if (ct) {