5261 libm should stop using synonyms.h

*** 28,38 ****
  
          .file   "fabsf.s"
  
  #include "libm.h"
  LIBM_ANSI_PRAGMA_WEAK(fabsf,function)
- #include "libm_synonyms.h"
  
          ENTRY(fabsf)
          flds    4(%esp)
  #undef  fabs
          fabs
--- 28,37 ----