5261 libm should stop using synonyms.h

@@ -24,11 +24,11 @@
 /*
  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
-#pragma weak log1p = __log1p
+#pragma weak __log1p = log1p
 
 /* INDENT OFF */
 /*
  * Method :
  *   1. Argument Reduction: find k and f such that