libvirt-machine: Sync clock on restore
libvirt-machine: Sync clock on restore

On restoring a libvirt VM from saved state, try to sync the guest clock
with host clock. This will only work if Qemu guest agent is running
inside the guest.

https://bugzilla.gnome.org/show_bug.cgi?id=758321

vbenes/gnome-boxes,vbenes/gnome-boxes