5261 libm should stop using synonyms.h

*** 28,38 ****
   */
  
  #pragma weak nearbyintf = __nearbyintf
  
  #include "libm.h"
- #include "fenv_synonyms.h"
  #include <fenv.h>
  
  float
  __nearbyintf(float x) {
          union {
--- 28,37 ----