5261 libm should stop using synonyms.h

*** 28,38 ****
  
          .file   "llrint.s"
  
  #include "libm.h"
  LIBM_ANSI_PRAGMA_WEAK(llrint,function)
- #include "libm_synonyms.h"
  
          ENTRY(llrint)
          movl    %esp,%ecx
          subl    $8,%esp
          fldl    4(%ecx)                 / load x
--- 28,37 ----