[vala] (34 commits) Non-fast-forward update to branch wip/gtask

[Rico Tzschichholz <ricotz src gnome org>]

The branch 'wip/gtask' 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:

  54356fd... codegen: Use GTask instead of GSimpleAsyncResult if 2.36 ta
  b4e7fdd... async: NULL check for cancelled GTasks
  582f222... codegen: Force sync behavior of GTasks
  647ebda... ONLY FOR TESTING - Require and target glib >= 2.36

Commits added to the branch:

  5f851eb... vapi: Update GIR-based bindings (*)
  5c5245d... glib-2.0: Add UCS-4 and UTF-16 related bindings (*)
  a4f9cac... gio-2.0: Use only metadata for IOStream, InputStream, Outpu (*)
  4d2544f... gio-2.0 Update SettingsBackend related bindings (*)
  e7f987a... codegen: Fix emission of constant array length (*)
  566ff81... codegen: Fix array length of array returned by lambda (*)
  2bf3d97... vala: Check type arguments in DataType.equals (*)
  1fcd716... Do not report internal error for invalid code with nested g (*)
  78588e6... vala: Check accessibility of default arguments (*)
  3ddd120... tests: Don't rely on external delegate defintions (*)
  48ca4e0... Add missing generic-type arguments of delegates (*)
  aa62c1a... gdk-3.0: Use only metadata for EventKey, Screen, Window, up (*)
  1eb03e1... libarchive: Add ReadDisk (*)
  588c00e... Deny access to protected constructors (*)
  ed3d936... codegen: Include gio/gio.h for "use_string_marshalling" (*)
  22ee9f6... clutter-1.0: Fix constructors which weren't detected as suc (*)
  e79d86a... clutter-gst-3.0: Fix constructors which weren't detected as (*)
  d933e47... gio-2.0: Fix constructor which wasn't detected as such (*)
  5faa313... polkit-gobject-1: Fix constructors which weren't detected a (*)
  67939bd... polkit-gobject-1: Fix constructors which weren't detected a (*)
  3092923... clutter-gst-3.0: Fix constructor which wasn't detected as s (*)
  99aeafe... Ignore --thread commandline option and drop all gthread-2.0 (*)
  c68490a... vala: Add common Callable interface for Method, Delegate an (*)
  83b0feb... Make use of Callable to replace some if-else-trees (*)
  213cec8... codegen: Trigger deprecation warning for NoArrayLength from (*)
  a4ab617... genie: Add empty file check to read_token () (*)
  4797d90... vapi: Update GIR-based bindings (*)
  3bbf223... codegen: Use g_signal_emit where possible (*)
  e1ed6ce... Support [HasEmitter] for vala sources (*)
  4bed25c... Warn about mismatched parameter direction before mismatched (*)
  9bf7d50... codegen: Use GTask instead of GSimpleAsyncResult if 2.36 ta
  18a5293... async: NULL check for cancelled GTasks
  de91deb... codegen: Force sync behavior of GTasks
  3802cff... ONLY FOR TESTING - Require and target glib >= 2.36

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