[vala] (16 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:

  5834079... girparser: Avoid fatal handling of nameless unions
  12c7f57... gtk+-3.0: Switch to GIR

Commits added to the branch:

  75d94cc... cairo: Pass through vapigen to sort and fully qualify symbo (*)
  319c8de... cairo: Add new symbols for 1.16 (*)
  49b634d... cairo: Fix Context.show_text_glyphs() binding (*)
  97de315... Check type parameters when comparing types (*)
  b019148... Report internal error for invalid type parameter comparison (*)
  4fcef86... gidlparser: Special handling for some ambiguous cairo symbo (*)
  00a5748... vapi: Update GIR-based bindings (*)
  af03c0d... gobject-2.0: Fix binding of ParamSpec.get_default_value() (*)
  94acede... posix: Correct documentation comment for crypt() (*)
  e017c96... libxml-2.0: Fix 'htmlEncodeEntities' and 'UTF8ToHtml' using (*)
  28fa531... json-glib-1.0: Fix 'Json.Serializable' interface metadata (*)
  5d25a8c... vapi: Update GIR-based bindings (*)
  52f3661... gidlparser: Make sure to only handle the needed cairo symbo (*)
  0176ead... gtk+-3.0: Update to 3.21.4+0f329195 (*)
  245d397... girparser: Avoid fatal handling of nameless unions
  74acc05... gtk+-3.0: Switch to GIR

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