5261 libm should stop using synonyms.h

*** 25,36 ****
  /*
   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
! #pragma weak signgaml = __signgaml
  
  #include "libm.h"
- #include "libm_synonyms.h"
  #include "longdouble.h"
  
  int signgaml = 0;
--- 25,35 ----
  /*
   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
! #pragma weak __signgaml = signgaml
  
  #include "libm.h"
  #include "longdouble.h"
  
  int signgaml = 0;