[mutter] (4 commits) Non-fast-forward update to branch wip/nielsdg/use-g-declare-interface

[Niels De Graef <nielsdg src gnome org>]

The branch 'wip/nielsdg/use-g-declare-interface' 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:

  3efd4d9... clutter: StageWindow: Use G_DECLARE_INTERFACE()
  5fba050... clutter: Content: Use G_DECLARE_INTERFACE()
  28bcc66... clutter: MasterClock: Use G_DECLARE_INTERFACE()
  7519b76... clutter: Animatable: Use G_DECLARE_INTERFACE()

Commits added to the branch:

  8aa8728... clutter: StageWindow: Use G_DECLARE_INTERFACE()
  7a1a512... clutter: Content: Use G_DECLARE_INTERFACE()
  e599418... clutter: MasterClock: Use G_DECLARE_INTERFACE()
  19c1ea7... clutter: Animatable: Use G_DECLARE_INTERFACE()