5261 libm should stop using synonyms.h

*** 25,35 ****
  /*
   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
! #pragma weak scalbln = __scalbln
  
  #include "libm.h"
  #include <float.h>              /* DBL_MAX, DBL_MIN */
  
  static const double twom54 = 5.5511151231257827021181583404541015625e-17;
--- 25,35 ----
  /*
   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
! #pragma weak __scalbln = scalbln
  
  #include "libm.h"
  #include <float.h>              /* DBL_MAX, DBL_MIN */
  
  static const double twom54 = 5.5511151231257827021181583404541015625e-17;