[gnome-software] (7 commits) ...rpm-ostree: Use libdnf to figure out what packages are available

[Kalev Lember <klember src gnome org>]

Summary of changes:

  023de72... appstream: Always set system scope for packages (*)
  a1f34de... plugin loader: Don't filter compulsory apps when getting ca (*)
  f6368cc... rpm-ostree: trivial: Fix whitespace (*)
  ec95b24... rpm-ostree: Hook up percentage progress for install and rem (*)
  4580d92... rpm-ostree: trivial: Avoid changing installing/removing sta (*)
  5142605... rpm-ostree: Implement layered package install (*)
  e6c3d4d... rpm-ostree: Use libdnf to figure out what packages are avai

(*) This commit already existed in another branch; no separate mail sent