5261 libm should stop using synonyms.h

*** 24,36 ****
  /*
   * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
! #pragma weak carg = __carg
  
- #include "libm_synonyms.h"
  #include <math.h>               /* atan2 */
  #include "complex_wrapper.h"
  
  static const double
          pi      = 3.14159265358979311600e+00,
--- 24,35 ----
  /*
   * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
! #pragma weak __carg = carg
  
  #include <math.h>               /* atan2 */
  #include "complex_wrapper.h"
  
  static const double
          pi      = 3.14159265358979311600e+00,