[mutter] (3 commits) Non-fast-forward update to branch wip/nielsdg/add-wayland-buf-docs

[Niels De Graef <nielsdg src gnome org>]

The branch 'wip/nielsdg/add-wayland-buf-docs' 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:

  5377a01... wayland: Add documentation for dma-buf namespace
  ab25e9d... wayland: Add documentation to the WaylandBuffer object
  fe42942... wayland: Add documentation to wayland_shell_init

Commits added to the branch:

  84415f9... wayland: Add documentation for dma-buf namespace
  355d486... wayland: Add documentation to the WaylandBuffer object
  4233ecd... wayland: Add documentation to wayland_shell_init