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 log2 = __log2
  
  /* INDENT OFF */
  /*
   * log2(x) = log(x)/log2
   *
--- 25,35 ----
  /*
   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
! #pragma weak __log2 = log2
  
  /* INDENT OFF */
  /*
   * log2(x) = log(x)/log2
   *
*** 86,96 ****
   * shown.
   */
  /* INDENT ON */
  
  #include "libm.h"
- #include "libm_synonyms.h"
  #include "libm_protos.h"
  
  extern const double _TBL_log[];
  
  static const double P[] = {
--- 86,95 ----