[mutter] (9 commits) Non-fast-forward update to branch wip/carlosg/small-api-cleanups

[Carlos Garnacho <carlosg src gnome org>]

The branch 'wip/carlosg/small-api-cleanups' 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:

  0453048... backends: Use graphene_point_t on meta_cursor_tracker_get_p
  494ef6a... clutter: Drop clutter_event_peek()
  5d883ef... clutter: Do not special case allocated events

Commits added to the branch:

  b536a53... place: Use 'placement' topic for logging monitor rect (*)
  9a75de9... util: Remove a bunch of unused debug topics (*)
  24c374f... util: Remove unused meta_debug_spew() (*)
  b1ffd14... main: Parse MUTTER_DEBUG as debug string (*)
  4982485... util: Remove now unused debug functions (*)
  e0944b6... backend: Don't pull generated headers (indirectly) (*)
  4ffd8dd... backends: Use graphene_point_t on meta_cursor_tracker_get_p
  a740261... clutter: Drop clutter_event_peek()
  b3e836f... clutter: Do not special case allocated events

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