[mutter] (7 commits) Non-fast-forward update to branch wip/carlosg/xwayland-on-demand

[Carlos Garnacho <carlosg src gnome org>]

The branch 'wip/carlosg/xwayland-on-demand' 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:

  67e10ef... wayland: Add tracking of X11 windows
  1e87fe5... wayland: Refactor code setting up the display socket
  d8143f3... wayland: Add setting/api to check the policy to set up the 
  d004922... x11: Shuffle x11-stack destruction in MetaX11Display dispos
  00b780f... x11: Add "closing" flag to MetaX11Display
  3252a97... core: Avoid queueing a stack operation on the frame when th
  e62cd37... wayland: Implement on-demand start of Xwayland

Commits added to the branch:

  c7c43c9... wayland: Add tracking of X11 windows
  b2685a2... wayland: Refactor code setting up the display socket
  d02f7f1... wayland: Add setting/api to check the policy to set up the 
  c25efb0... x11: Shuffle x11-stack destruction in MetaX11Display dispos
  ffc4c89... x11: Add "closing" flag to MetaX11Display
  800602e... core: Avoid queueing a stack operation on the frame when th
  1ed1eae... wayland: Implement on-demand start of Xwayland