[gobject-introspection] (4 commits) Non-fast-forward update to branch ebassi/final-type

[Emmanuele Bassi <ebassi src gnome org>]

The branch 'ebassi/final-type' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  ae4f2de... Add version macros for 1.70
  28c2994... Add "final" class attribute
  babf642... Add newly added girepository symbol to the API reference

Commits added to the branch:

  793b46c... Clean up the subproject rules for GLib (*)
  b2b4583... Add version macros for 1.70
  1e0db5c... Add "final" class attribute
  50ef6e4... Add newly added girepository symbol to the API reference

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