This is a WIP. I hope to get some eyes as I'm a bit stuck.
The idea is to feed the libflux (rust lib) through pkgconfig to the flux
go build with a .pc file. This should work as explained here:
https://github.com/influxdata/flux/issues/4535
It actually builds just fine from make on the terminal, but fails in
poudriere as it embeds the rust build in the go build, and tries to
access the internet during that time.