5261 libm should stop using synonyms.h

*** 25,36 ****
  /*
   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
! #pragma weak erf = __erf
! #pragma weak erfc = __erfc
  
  /* INDENT OFF */
  /*
   * double erf(double x)
   * double erfc(double x)
--- 25,36 ----
  /*
   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
! #pragma weak __erf = erf
! #pragma weak __erfc = erfc
  
  /* INDENT OFF */
  /*
   * double erf(double x)
   * double erfc(double x)
*** 125,135 ****
   *              erfc(0) = 1, erfc(inf) = 0, erfc(-inf) = 2,
   *      erfc/erf(NaN) is NaN
   */
  /* INDENT ON */
  
- #include "libm_synonyms.h"      /* __erf, __erfc, __exp */
  #include "libm_macros.h"
  #include <math.h>
  
  static const double xxx[] = {
  /* tiny */      1e-300,
--- 125,134 ----