5261 libm should stop using synonyms.h

*** 27,38 ****
   */
  
          .file "exp10f.s"
  
  #include "libm.h"
- LIBM_ANSI_PRAGMA_WEAK(exp10f,function)
- #include "libm_synonyms.h"
  
          ENTRY(exp10f)
          movl    4(%esp),%ecx            / ecx <-- x
          andl    $0x7fffffff,%ecx        / ecx <-- |x|
          cmpl    $0x3e9a209a,%ecx        / Is |x| < log10(2)?
--- 27,36 ----