5261 libm should stop using synonyms.h

*** 27,37 ****
   */
  
          .file   "__swapFLAGS.s"
  
  #include "libm.h"
- #include "libm_synonyms.h"
  
  /*
   * swap exception masks
   *
   * Put the complement of bits 5-0 of the argument into FPCW bits 5-0
--- 27,36 ----