[mutter] (21 commits) Non-fast-forward update to branch wip/carlosg/backendless-clutter

[Marge Bot <marge-bot 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:

  579748c... backends/native: Remove unused array definition
  1d27cb7... clutter: Demote CLUTTER_NOTE to g_debug in clutter-stage-co
  5d3c85f... clutter: Make ClutterDamageHistory API public to mutter
  9a39502... clutter: Make ClutterStageView API public to mutter
  4bff5b1... clutter: Export private function to get debug flags
  39184f2... core: Add private utility function to get Clutter debug fla
  62f7eea... clutter: Move ClutterStageCogl[View] code to src/backends
  749d229... backends: Rename ClutterStage[View]Cogl API and types
  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

Commits added to the branch:

  58f053d... drm-buffer/dumb: Return TRUE when init succeeded (*)
  b65555a... renderer/native: Include error message in log entries (*)
  e437504... cogl/gl: Handle bogus glGetString(GL_RENDERER) return value (*)
  4b66313... util: Add 'backend' debug topic (*)
  d057762... device-pool: Add debug logging (*)
  a2937a4... onscreen/native: Change some g_debug() meta_topic() (*)
  1202078... backends/native: Remove unused array definition
  1484821... clutter: Demote CLUTTER_NOTE to g_debug in clutter-stage-co
  733368c... clutter: Make ClutterDamageHistory API public to mutter
  907b396... clutter: Make ClutterStageView API public to mutter
  fd0e2cc... clutter: Export private function to get debug flags
  5f41c2e... core: Add private utility function to get Clutter debug fla
  c85011a... clutter: Move ClutterStageCogl[View] code to src/backends
  5f4801d... backends: Rename ClutterStage[View]Cogl API and types
  5b59488... backends: Excise MetaStageView to its own file
  ee174ed... clutter: Drop Xsettings client code
  b372370... clutter: Drop dead X11 code
  a3aaa5e... backends: Shuffle ClutterBackendX11 code into MetaClutterBa
  1a37876... clutter: Drop generation of x11 pkgconfig file
  158f4ab... clutter: Remove leftovers from backend code in build system
  c9948b2... clutter: Remove unused EGL header

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