[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:

  0707a56... gio-2.0: Fix binding of Resolver.lookup_service*()
  27d1fcd... gio-2.0: Keep GLib.Socket API compatible with gio < 2.48

Commits added to the branch:

  34f3b85... glib-2.0: Fix binding of Markup.collect_attributes (*)
  ad59a4c... gio-2.0: Fix binding of Resolver.lookup_service*() (*)
  28dd295... gio-2.0: Keep GLib.Socket API compatible with gio < 2.48 (*)
  1ec6f26... gio-2.0: Fix async constructors of AsyncInitable, DBusConne

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