firewall: update to latest git HEAD

c26f8907d1d2 firewall3: fix typo that affects ICMPv6 rules with numeric icmp_type

Signed-off-by: Petr Štetiar <ynezz@true.cz>

package/network/config/firewall/Makefile

@@ -13,9 +13,9 @@ PKG_RELEASE:=1
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL=$(PROJECT_GIT)/project/firewall3.git
-PKG_SOURCE_DATE:=2019-09-08
-PKG_SOURCE_VERSION:=487bd0d96c8fb9a53871134ebba7c0a66e286334
-PKG_MIRROR_HASH:=23f22468bba41ce372110705989529076ffb3474ce871fec0120da2b303654b9
+PKG_SOURCE_DATE:=2019-09-15
+PKG_SOURCE_VERSION:=c26f8907d1d2921018240774b75cf9cfda352fa7
+PKG_MIRROR_HASH:=5a2a6bca58d6b3bd10afbddbfacd57820fb48a0954279b25923b07a27f667e10
 PKG_MAINTAINER:=Jo-Philipp Wich <jo@mein.io>
 PKG_LICENSE:=ISC