checkpolicy: add missing ; to attribute_role_def

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

This patch looks good to me. acked.

Simple fix for a missing ';'
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.11 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/

iEYEARECAAYFAk5D4tgACgkQrlYvE4MpobNUmQCfdSRjuWwrvmQajddsYikLMvG4 NcIAn2zFf4tgO5IC0FR7c+Z82asi8V06
=/N3t
-----END PGP SIGNATURE-----