[mutter] (15 commits) Non-fast-forward update to branch wip/carlosg/async-xwayland-startup

[Jonas Ådahl <jadahl src gnome org>]

The branch 'wip/carlosg/async-xwayland-startup' 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:

  9d53c9e... x11: Set up the compositing manager selection on meta_displ
  31a5f4e... tests: Ensure MetaX11Display is initialized before running 
  b623e38... tests: Set fatal log handler on clutter tests
  0255b77... core: Make meta_display_init_x11() an async function
  791cbda... xwayland: Do not block on Xwayland initialization
  f6663ac... compositor: Shuffle x11 compositing bits in MetaCompositor

Commits added to the branch:

  038a317... cogl/framebuffer: Add cogl_framebuffer_flush (*)
  3881c1f... cogl/context: Add cogl_renderer_create_dma_buf() and family (*)
  7fbb47b... renderer-native: Move DMA buffer creation to an auxiliary f (*)
  d366fb3... renderer-native: Implement DMA buffer creation (*)
  548073e... screen-cast-stream-src: Support DMA buffer sharing (*)
  680a54a... monitor-stream-src: Implement blitting view framebuffers (*)
  86168b9... window-stream-source: Draw into DMA buffer image (*)
  1f190a7... screen-cast-stream-src: Remove unused parameter (*)
  09026e5... monitor-stream-src: Use cogl_framebuffer_finish() (*)
  87a06c6... x11: Set up the compositing manager selection on meta_displ
  21994bb... tests: Ensure MetaX11Display is initialized before running 
  8c332a4... tests: Set fatal log handler on clutter tests
  649911b... core: Make meta_display_init_x11() an async function
  25c9e66... xwayland: Do not block on Xwayland initialization
  4b513a3... compositor: Shuffle x11 compositing bits in MetaCompositor

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