5261 libm should stop using synonyms.h
5298 fabs is 0-sized, confuses dis(1) and others
Reviewed by: Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
Approved by: Gordon Ross <gwr@nexenta.com>

@@ -28,13 +28,10 @@
 
         .file "acosl.s"
 
 #include "libm.h"
 LIBM_ANSI_PRAGMA_WEAK(acosl,function)
-#include "libm_synonyms.h"
-
-#undef fabs
 
         ENTRY(acosl)
         fldt    8(%rsp)                 / push x
         fld1                            / push 1
         fld     %st(1)                  / x , 1 , x