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 acoshl = __acoshl
+#pragma weak __acoshl = acoshl
 
 #include "libm.h"
 
 static const long double
         zero    = 0.0L,