[vala] (12 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:

  245d397... girparser: Avoid fatal handling of nameless unions
  3a415f5... gtk+-3.0: Switch to GIR

Commits added to the branch:

  69c938d... glib-2.0: Add new symbols for 2.50 (*)
  fbbeeba... vapi: Update GIR-based bindings (*)
  edc5034... gtk+-3.0: Update to 3.21.4+e4c072fc (*)
  4784e05... vapi: Update GIR-based bindings (*)
  f103ea0... gtk+-3.0: Update to 3.21.4+64c15545 (*)
  321dea0... vapi: Update GIR-based bindings (*)
  42808df... gtk+-3.0: Update to 3.21.4+edce8f4d (*)
  981b382... vapi: Update GIR-based bindings (*)
  274dbc6... gtk+-3.0: Update to 3.21.5 (*)
  950f081... gobject-2.0: Fix and make FlagsValue a struct (*)
  f20a559... girparser: Avoid fatal handling of nameless unions
  289ce7f... gtk+-3.0: Switch to GIR

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