[mutter] Non-fast-forward update to branch wip/carlosg/fix-second-monitor-invalidations

[Carlos Garnacho <carlosg src gnome org>]

The branch 'wip/carlosg/fix-second-monitor-invalidations' 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:

  f8d9e3b... clutter/cogl: Fix invalidation on non-primary monitors with

Commits added to the branch:

  e0da39b... clutter/cogl: Fix invalidation on non-primary monitors with