[mutter] (3 commits) Non-fast-forward update to branch wip/carlosg/centralized-panel-auto-orientation

[Carlos Garnacho <carlosg src gnome org>]

The branch 'wip/carlosg/centralized-panel-auto-orientation' 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:

  115131b... backends: Add method/property to get accelerometer availabi
  52dd14a... backends: Centralize panel autorotation in a DisplayConfig 
  daa7ca9... backends: Hook ClutterSeat::touch-mode to PanelOrientationM

Commits added to the branch:

  71f1f7c... backends: Add method/property to get accelerometer availabi
  c67d0b8... backends: Centralize panel autorotation in a DisplayConfig 
  e0a91ed... backends: Hook ClutterSeat::touch-mode to PanelOrientationM