[mutter] (12 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:

  278249d... cogl: Add support for clipping regions
  9f406f2... clutter/cogl: Use regions for clipping if necessary
  2c6796b... compositor: Use redraw clip region to cull out children
  53c0350... cogl: Drop unused struct field
  1b45a3d... clutter: Check updated devices with the current clip
  54929d8... clutter: Drop unused API

Commits added to the branch:

  563e713... Allow changing Clutter debug flags at runtime (*)
  9678fd5... clutter/cogl: Scale clip region in paint_stage() (*)
  23fa59b... display: Move finishing of touch sequence to the backend (*)
  9428835... x11: Limit touch replay pointer events to when replaying (*)
  f2b3dd3... wayland: Check stylus serials on meta_wayland_seat_can_popu (*)
  40a7659... ci: Update docker image to v3 (*)
  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

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