5261 libm should stop using synonyms.h

*** 24,34 ****
  /*
   * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
! #pragma weak tanf = __tanf
  
  #include "libm.h"
  
  extern const int _TBL_ipio2_inf[];
  extern int __rem_pio2m(double *, double *, int, int, int, const int *);
--- 24,34 ----
  /*
   * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
! #pragma weak __tanf = tanf
  
  #include "libm.h"
  
  extern const int _TBL_ipio2_inf[];
  extern int __rem_pio2m(double *, double *, int, int, int, const int *);