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 tanhl = __tanhl
+#pragma weak __tanhl = tanhl
 
 /*
  * tanhl(x) returns the hyperbolic tangent of x
  *
  * Method :