5261 libm should stop using synonyms.h

*** 37,47 ****
  /          2         -S          -C             S/C
  /          3         -C           S            -C/S
  /     ----------------------------------------------------------
  
  #include "libm.h"
- #include "libm_synonyms.h"
  #include "libm_protos.h"
  #undef fabs
  
          ENTRY(__reduction)
  #ifndef PIC
--- 37,46 ----