[mutter] (6 commits) Non-fast-forward update to branch wip/carlosg/input-thread

[Carlos Garnacho <carlosg src gnome org>]

The branch 'wip/carlosg/input-thread' 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:

  c4f60b3... backends/native: Add input thread inside MetaSeatImpl
  a3b2865... clutter: Do not use stack-allocated ClutterEvents
  91a8d5b... backends: Do not use stack-allocated ClutterEvents
  5be48aa... clutter: Do not special case allocated events
  1392b22... core: Do not update last device on CLUTTER_DEVICE_ADDED/REM
  39ab9b0... backends: Ensure to clear the last updated device on device

Commits added to the branch:

  6605375... backends/native: Add input thread inside MetaSeatImpl
  613e426... clutter: Do not use stack-allocated ClutterEvents
  b1dd96e... backends: Do not use stack-allocated ClutterEvents
  387e533... clutter: Do not special case allocated events
  0a3d3d9... core: Do not update last device on CLUTTER_DEVICE_ADDED/REM
  945a9d6... backends: Ensure to clear the last updated device on device