HACK: obs: add nftables, libnftnl

I've used this to import latest versions of nftables and libnftnl
packaging from debian's salsa to our OBS (for building osmo-upf).

  ./update_obs_project.py -f latest obs:proj:path nftables-deb
  ./update_obs_project.py -f latest obs:proj:path libnftnl-deb

Change-Id: I699ebe4fe8ec93a01fa8c3bd17693d5f8fca5804
2 files changed