[mutter] (22 commits) Non-fast-forward update to branch wip/carlosg/clip-regions

[Carlos Garnacho <carlosg src gnome org>]

The branch 'wip/carlosg/clip-regions' 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:

  1194435... cogl: Add support for clipping regions
  c49e291... clutter/cogl: Use regions for clipping if necessary
  1707b59... compositor: Use redraw clip region to cull out children
  e5e18ba... cogl: Drop unused struct field
  631d81c... clutter: Check updated devices with the current clip
  4eeaa68... clutter: Drop unused API

Commits added to the branch:

  3f9c5d0... cogl: Remove old workaround for software Mesa (*)
  46aeb96... ci: Add gnome-control-center (*)
  17e39ad... cogl: Remove support for cogl.conf (*)
  6b8ee80... cogl: Remove unused deprecated material lighting API (*)
  468dc99... cogl: Remove unused pipeline lighting API (*)
  711023e... cogl: Remove unused COGL_PIPELINE_STATE_LIGHTING (*)
  e84dbd7... cogl: Remove unused CoglPipelineLightingState (*)
  13d9e4d... cogl: Remove unused cogl/cogl-pango.h (*)
  793c2ac... cogl: Remove unused cogl-deprecated.h (*)
  7c036c5... cogl: fix a compile warning (*)
  f4f7e31... cogl: Fix GLES2 fallback (*)
  6ee7c0f... cogl/egl: Warn when we fail to query a buffer age. (*)
  ee4638e... cogl/egl: Make surface current before querying buffer age (*)
  d47324e... cogl/egl: Explicitly initialize age variable (*)
  cf89e4d... clutter/cogl: Fix invalidation on non-primary monitors with (*)
  6bfa61a... Revert "clutter/cogl: Store empty clip regions for buffer a (*)
  b930e5e... cogl: Add support for clipping regions
  61b3acb... clutter/cogl: Use regions for clipping if necessary
  79b05f8... compositor: Use redraw clip region to cull out children
  5959677... cogl: Drop unused struct field
  7914aea... clutter: Check updated devices with the current clip
  206385e... clutter: Drop unused API

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