Last minute freeze exception for mutter

[Jonas Ådahl <jadahl gmail com>]

I'd like to request a freeze exception for mutter, for solving a bug
that results in the mouse cursor not being displayed on older
generations of Radeon GPUs.

The fix also proven to fix lack of mouse cursor when using DisplayLink.

https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1079

https://gitlab.gnome.org/GNOME/mutter/issues/1058

The issue was discovered during one of the Fedora test days, but the fix
got lost in the sea of merge requests, but since the system becomes
somewhat unusable (no mouse cursor) for users with such hardware, it's
fairly crucial.

The fix is fairly safe and unintrusive, and has been regression tested
by myself and by Pekka on DisplayLink hardware having the same kind of
limitations as the older generation Radeon cards.


Jonas