Previously, if a package just depended on GLib (or other bindings shipped with gobject-introspection),
wrapper was not needed since `${gobject-introspection}/lib/girepository-1.0` is implicitly on typelib path.
Now that GLib bindings were moved to `glib` package, `${glib}/lib/girepository-1.0` must be added
to `GI_TYPELIB_PATH` by the wrapper (or `gobject-introspection` setup hook for build time).
Simplest way to ensure that is using `wrapGApps*` hook.
Let’s also ensure that there is just one wrapper instead of three.
Jan Tojnar
0d67b5508d