[mutter] (7 commits) Non-fast-forward update to branch wip/carlosg/backendless-clutter

[Carlos Garnacho <carlosg src gnome org>]

The branch 'wip/carlosg/backendless-clutter' 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:

  ebddaa5... backends: Excise MetaStageView to its own file
  01a8b07... clutter: Drop Xsettings client code
  1053055... clutter: Drop dead X11 code
  ba82eb2... backends: Shuffle ClutterBackendX11 code into MetaClutterBa
  e863a69... clutter: Drop generation of x11 pkgconfig file
  02c64a7... clutter: Remove leftovers from backend code in build system
  2fee051... clutter: Remove unused EGL header

Commits added to the branch:

  57f0e0c... backends: Excise MetaStageView to its own file
  df30799... clutter: Drop Xsettings client code
  0a1a59a... clutter: Drop dead X11 code
  23d23df... backends: Shuffle ClutterBackendX11 code into MetaClutterBa
  a9fa112... clutter: Drop generation of x11 pkgconfig file
  e70f901... clutter: Remove leftovers from backend code in build system
  35a7100... clutter: Remove unused EGL header