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 expf = __expf
+#pragma weak __expf = expf
 
 /* INDENT OFF */
 /*
  * float expf(float x);
  * Code by K.C. Ng for SUN 5.0 libmopt