core-deps: update libvirt-glib to 4.0.0
See https://www.berrange.com/posts/2021/02/15/announce-libvirt-glib-release-4-0-0/
This is needed by gnome-boxes!397 (merged) which adds USB3 support for supported guests in GNOME Boxes.
See https://www.berrange.com/posts/2021/02/15/announce-libvirt-glib-release-4-0-0/
This is needed by gnome-boxes!397 (merged) which adds USB3 support for supported guests in GNOME Boxes.