5261 libm should stop using synonyms.h

@@ -25,14 +25,13 @@
 /*
  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
-#pragma weak fegetprec = __fegetprec
-#pragma weak fesetprec = __fesetprec
+#pragma weak __fegetprec = fegetprec
+#pragma weak __fesetprec = fesetprec
 
-#include "fenv_synonyms.h"
 #include <fenv.h>
 #include <ucontext.h>
 #include <thread.h>
 #include "fex_handler.h"