5261 libm should stop using synonyms.h

*** 27,38 ****
   */
  
          .file "finitel.s"
  
  #include "libm.h"
- LIBM_ANSI_PRAGMA_WEAK(finitel,function)
- #include "libm_synonyms.h"
  
          ENTRY(finitel)
          movl    12(%esp),%eax           / %ax <-- sign&bexp(x)
          testl   $0x80000000,8(%esp)     / ZF = 1 iff hi_32(sgnfcnd(x))'s msb = 0
          jz      .chk_denormal_or_0
--- 27,36 ----