d/copyright: use common dep5 license names
d/copyright: use common dep5 license names

Signed-off-by: Christian Ehrhardt <48da28e2c2cd455d60e19b14c46925e20a3c5d5b@canonical.com>

agx/libvirt-debian,agx/libvirt-debian,agx/libvirt-debian,agx/libvirt-debian,agx/libvirt-debian