coova-chilli: fix libxt-coova not loading properly from iptables ( op…

…enwrt#23092 )

net/coova-chilli/patches/020-libxt_coova-Use-constructor-instead-of-_init.patch

@@ -26,7 +26,7 @@ Signed-off-by: Hauke Mehrtens <[email protected]>
  };
 
 -void _init(void)
-+void __attribute__ ((constructor)) xtables_init(void)
++void __attribute__ ((constructor)) libxt_coova_init(void)
  {
  	xtables_register_match(&coova_mt_reg);
  	xtables_register_match(&coova_mt6_reg);