5261 libm should stop using synonyms.h

@@ -25,11 +25,11 @@
 /*
  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
-#pragma weak asinhl = __asinhl
+#pragma weak __asinhl = asinhl
 
 #include "libm.h"
 
 static const long double
         ln2     = 6.931471805599453094172321214581765680755e-0001L,