[vala] (4 commits) Non-fast-forward update to branch wip/gio-2.0

[Rico Tzschichholz <ricotz src gnome org>]

The branch 'wip/gio-2.0' 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:

  131195f... gio-2.0: Fix async constructors of AsyncInitable, DBusConne
  cb08842... gio-2.0: Use metadata instead of custom definitions for DBu

Commits added to the branch:

  f8fba4c... tests: Add async constructor test (*)
  ded946f... gio-2.0: Fix async constructors of AsyncInitable, DBusConne
  f824d56... gio-2.0: Use metadata instead of custom definitions for DBu
  1e74890... gio-2.0: Use metadata instead of custom defintions for Init

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