kernel: add a config option for keeping the kallsyms table uncompressed, saving ~9kb kernel size after lzma on ar71xx

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35154 3c298f89-4303-0410-b956-a3cf2f4a3e73
netfilter.mk: add addrtype match to iptables-mod-extra (kmod-ipt-extra)

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35155 3c298f89-4303-0410-b956-a3cf2f4a3e73