Bug#1067582: gnuplot: please provide a profile to break B-D cycle

[Dima Kogan]

OK. I just pushed your suggestion to the git repo.

You can now build gnuplot-nox without the qt or wxt dependencies.

Does it help you, though? Without gnuplot-data you won't be able to
install gnuplot-nox to satisfy the downstream Build-Depends. Is that
still OK for you? If so, reply here, and I'll do a Team Upload.