Add Sandia to LICENSE

This commit was SVN r10305.

LICENSE

@@ -10,6 +10,7 @@ Copyright (c) 2004-2006 The Regents of the University of California.
                         All rights reserved.
 Copyright (c) 2006      Cisco Systems, Inc.  All rights reserved.
 Copyright (c) 2006      Voltaire, Inc. All rights reserved.
+Copyright (c) 2006      Sandia National Laboratories. All rights reserved.
 $COPYRIGHT$
 
 Additional copyrights may follow