gnome-shell-build-setup.sh: redo installing dependencies

* Consolidate all dependency information into one place, rather than
  having a comment and per-distribution lists.
* Remove packages that are in the GNOME moduleset;
  jhbuild sysdeps --install will install these when possible.
* Install 'apt-file' and run 'apt-file update' on Debian-based distributions.
* Actually run sudo rather than prompting the user to run it and exiting;
  the exit-and-restart approach doesn't work for 'apt-file update'.
* Run 'jhbuild sysdeps --install'

https://bugzilla.gnome.org/show_bug.cgi?id=668440