selinux: explicitly declare the role "base_r"

This fixes the compilation of policy generated by mdp with the recent
version of checkpolicy.
Signed-off-by: Laurent Bigonville <bigon@bigon.be>
Acked-by: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: Paul Moore <pmoore@redhat.com>

scripts/selinux/mdp/mdp.c

@@ -98,6 +98,7 @@ int main(int argc, char *argv[])
 
 	/* types, roles, and allows */
 	fprintf(fout, "type base_t;\n");
+	fprintf(fout, "role base_r;\n");
 	fprintf(fout, "role base_r types { base_t };\n");
 	for (i = 0; secclass_map[i].name; i++)
 		fprintf(fout, "allow base_t base_t:%s *;\n",