5261 libm should stop using synonyms.h

@@ -24,11 +24,11 @@
 /*
  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
-#pragma weak lgammaf_r = __lgammaf_r
+#pragma weak __lgammaf_r = lgammaf_r
 
 #include "libm.h"
 
 float
 lgammaf_r(float x, int *signgamfp) {