Replace libvirt-daemon-qemu with libvirt-daemon-kvm.
    
    The nomenclature is a bit confusing, but libvirt-daemon-kvm will pull
    in the KVM & TCG emulator for the same architecure which is what we need.
    
    libvirt-daemon-qemu pulls in the other-arch TCG emulators which we
    never need for libguestfs.
    
    The same change is already made in RHEL 7 and RHEL 8.