5261 libm should stop using synonyms.h

@@ -28,11 +28,10 @@
 
         .file "log10f.s"
 
 #include "libm.h"
 LIBM_ANSI_PRAGMA_WEAK(log10f,function)
-#include "libm_synonyms.h"
 #include "libm_protos.h"
 
         ENTRY(log10f)
         fldlg2  
         flds    4(%esp)                 / st = arg, st(1) = log10(2)