5261 libm should stop using synonyms.h

*** 24,34 ****
  /*
   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
! #pragma weak fmod = __fmod
  
  #include "libm.h"
  
  static const double zero = 0.0;
  
--- 24,34 ----
  /*
   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
! #pragma weak __fmod = fmod
  
  #include "libm.h"
  
  static const double zero = 0.0;