5261 libm should stop using synonyms.h

@@ -25,10 +25,10 @@
 /*
  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
-#pragma weak signgamf = __signgamf
+#pragma weak __signgamf = signgamf
 
 #include "libm.h"
 
 int signgamf = 0;