There's already a version present in Ubuntu's repositories. While
the xenial version is quite out of date, the artful version is
rather recent. I opine that we should optimize for Trisquel 9 in
this case.

Conflicts:
	helpers/make-firejail
	helpers/make-libsodium
	helpers/make-midori
	helpers/make-mozilla-kde-support
	helpers/make-scilab