firewall: add CONFIG_IPV6 to PKG_CONFIG_DEPENDS to fix a rebuild error

Signed-off-by: Felix Fietkau <[email protected]>

SVN-Revision: 48315

package/network/config/firewall/Makefile

@@ -19,6 +19,7 @@ PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION)-$(PKG_SOURCE_VERSION).tar.gz
 PKG_MAINTAINER:=Jo-Philipp Wich <[email protected]>
 PKG_LICENSE:=ISC
 
+PKG_CONFIG_DEPENDS := CONFIG_IPV6
 
 include $(INCLUDE_DIR)/package.mk
 include $(INCLUDE_DIR)/cmake.mk