5261 libm should stop using synonyms.h

@@ -28,11 +28,10 @@
 
         .file   "scalbnl.s"
 
 #include "libm.h"
 LIBM_ANSI_PRAGMA_WEAK(scalbnl,function)
-#include "libm_synonyms.h"
 
         ENTRY(scalbnl)
         fildl   16(%esp)                / convert 32-bit integer N
                                         / to extended-double
         fldt    4(%esp)                 / push x