6relayd: fix a lease-timing issue with stateful DHCPv6

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@36702 3c298f89-4303-0410-b956-a3cf2f4a3e73
firewall3: update to git head

  - fixes linking issues with some toolchains

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@36703 3c298f89-4303-0410-b956-a3cf2f4a3e73