[vala] (4 commits) Non-fast-forward update to branch wip/gtk4

[Rico Tzschichholz <ricotz src gnome org>]

The branch 'wip/gtk4' 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:

  cf85457... girparser: Avoid fatal handling of nameless unions
  1885eeb... vapi: Add gdk-4.0, gdk-x11-4.0, gtk+-4.0 bindings
  52f79d1... gtk+-4.0: Sync with git master

Commits added to the branch:

  88e5aab... ccode: Add missing newline after gnuc deprecations attribut (*)
  a18ad0f... girparser: Avoid fatal handling of nameless unions (*)
  aa8a394... vapi: Update GIR-based bindings (*)
  349c3e8... vapi: Add unstable bindings for gdk-4.0, gdk-x11-4.0, gsk-4

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