rpm: Set version information for libvirt-admin virtual name

rpm: Set version information for libvirt-admin virtual name

The libvirt-daemon package now provides the 'libvirt-admin' virtual
name, but the Provides stanza doesn't declare version information,
which breaks things depending on that package using a versioned
dependency. Fix this by setting the version-release of libvirt to
that name to mimic the previous state.

Fixes: 2244ac168d42c3fa424bae6d33ecdbb8726da7c2
Signed-off-by: Neal Gompa <ngompa13@gmail.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>