Cross compile static version of conntrack-tools

Hello all,

I'm trying to cross-compile my own version of conntrack-tools (in order to invalidate established sessions based on custom needs - e.g. when removing time-based firewall rules). I got my dev environment up by following this guide: https://github.com/RMerl/asuswrt-merlin/wiki/Compile-Firmware-from-source-using-Ubuntu, except I didn't use VirtualBox, but set up a lxc container instead.

I got everything set up and working although I had to do an extra step:
Cross compile static version of conntrack-tools