5261 libm should stop using synonyms.h

@@ -24,11 +24,11 @@
 /*
  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
-#pragma weak scalbn = __scalbn
+#pragma weak __scalbn = scalbn
 
 #include "libm.h"
 
 static const double
         one     = 1.0,