firewall: flush conntrack table after changing interface rules

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35348 3c298f89-4303-0410-b956-a3cf2f4a3e73
scripts: bundle-libraries.sh: support mixing 32bit and 64bit binaries

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35349 3c298f89-4303-0410-b956-a3cf2f4a3e73