WIP: Package for SteamRT 2 'spy'
While debugging !8 I tried building libsyscall-intercept for a newer environment (SteamRT 2 'spy', which is based on Ubuntu 18.04 and intended to be used in containers). This would probably also be a good basis for packaging in newer Debian, newer Ubuntu, or SteamOS 3 'clockwerk' if we want to do that.