[mutter] (6 commits) Non-fast-forward update to branch bilelmoussaoui/gdk-x11-only

[Bilal Elmoussaoui <bilelmoussaoui src gnome org>]

The branch 'bilelmoussaoui/gdk-x11-only' 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:

  b2f27d0... cleanup: Make GDK dependency specific to X11
  20873d3... compositor: Replace GdkRGBA with ClutterColor
  0b333cd... core: Add a in-tree copy of GtkBorder
  3469d74... core: Copy gtk_get_default_locale
  52ffa71... core: Replace gtk_accelerator_parse usage

Commits added to the branch:

  79324d8... cleanup: Make GDK dependency specific to X11
  888f3f0... compositor: Replace GdkRGBA with ClutterColor
  22eb17a... core: Add a in-tree copy of GtkBorder
  96aa171... core: Copy gtk_get_default_locale
  1c2ccdf... core: Replace gtk_accelerator_parse usage
  3ac9748... core: Add a copy of GDK_PRIORITY_EVENTS