[vala] (6 commits) Non-fast-forward update to branch wip/gtkgir

[Rico Tzschichholz <ricotz src gnome org>]

The branch 'wip/gtkgir' 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:

  04ce59c... girparser: Avoid fatal handling of nameless unions
  6cdc710... gtk+-3.0: switch to GIR

Commits added to the branch:

  0b297f4... Require and target GLib >= 2.32 (*)
  77b55a4... glib-2.0: Add Version annotations and more new symbols (*)
  2a54e24... vapi: Regenerate all bindings due Cond/Mutex changes (*)
  e78f0b9... Release 0.31.1 (*)
  5e22360... girparser: Avoid fatal handling of nameless unions
  314e507... gtk+-3.0: switch to GIR

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