[mutter] (15 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:

  fe1a827... backends/native: Remove unused array definition
  7cbe02d... clutter: Demote CLUTTER_NOTE to g_debug in clutter-stage-co
  14c2fe4... clutter: Make ClutterDamageHistory API public to mutter
  2d629b6... clutter: Make ClutterStageView API public to mutter
  4378df6... clutter: Export private function to get debug flags
  23bbfa1... core: Add private utility function to get Clutter debug fla
  2c43b73... clutter: Move ClutterStageCogl[View] code to src/backends
  d62fe4d... backends: Rename ClutterStage[View]Cogl API and types
  5401cb8... backends: Excise MetaStageView to its own file
  999fd5d... clutter: Drop Xsettings client code
  8b0539c... clutter: Drop dead X11 code
  b04b44f... backends: Shuffle ClutterBackendX11 code into MetaClutterBa
  5072604... clutter: Drop generation of x11 pkgconfig file
  28ac3a5... clutter: Remove leftovers from backend code in build system
  8564f82... clutter: Remove unused EGL header

Commits added to 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
  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