NEWS: Document PHP-6.0 and older removal
NEWS: Document PHP-6.0 and older removal

Signed-off-by: Michal Privoznik <83d82aaba2eed257f4814b0c239c260c4caaadf0@redhat.com>

libvirt/libvirt-php,libvirt/libvirt-php,libvirt/libvirt-php