gradle: Handle cnf project not being a bnd project
gradle: Handle cnf project not being a bnd project

The bndtools workspace template creates the cnf project with no bnd.bnd
file.

mcculls/bnd,lostiniceland/bnd,joansmith/bnd,GEBIT/bnd,joansmith/bnd,GEBIT/bnd,lostiniceland/bnd,magnet/bnd,xtracoder/bnd,magnet/bnd,psoreide/bnd,psoreide/bnd,mcculls/bnd,psoreide/bnd,lostiniceland/bnd,mcculls/bnd,magnet/bnd,xtracoder/bnd