Don't attempt to install libosmo-netif in this Dockerfile. I've noticed this because we want to build osmo-pcap for CentOS7 with this container to run the TTCN-3 tests, and we don't have libosmo-netif for CentOS7.
Add pkgconfig(libosmogb), which is required to build osmo-pcap according to configure.ac. In Debian, this gets installed as part of libosmocore-dev.
