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 ceil = __ceil
+#pragma weak __ceil = ceil
 
 /*
  * ceil(x) returns the least integral value bigger than or equal to x.
  * NOTE: ceil(x) returns result with the same sign as x's, including 0.
  *