firewall3: update to latest git HEAD

Signed-off-by: John Crispin <john@phrozen.org>

package/network/config/firewall/Makefile

@@ -9,13 +9,13 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=firewall
-PKG_VERSION:=2016-05-02
+PKG_VERSION:=2016-07-28
 PKG_RELEASE:=$(PKG_SOURCE_VERSION)
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL=$(LEDE_GIT)/project/firewall3.git
 PKG_SOURCE_SUBDIR:=$(PKG_NAME)-$(PKG_VERSION)
-PKG_SOURCE_VERSION:=6cccf1ba7f0c3eb34ef4a7adc6af501376bfa875
+PKG_SOURCE_VERSION:=47b23946cb2d51c486cd01596744955f850e2060
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION)-$(PKG_SOURCE_VERSION).tar.gz
 PKG_MAINTAINER:=Jo-Philipp Wich <jo@mein.io>
 PKG_LICENSE:=ISC