5261 libm should stop using synonyms.h

*** 25,47 ****
  /*
   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
! #pragma weak fex_merge_flags = __fex_merge_flags
  
! #pragma weak feholdexcept = __feholdexcept
! #pragma weak feupdateenv = __feupdateenv
! #pragma weak fegetenv = __fegetenv
! #pragma weak fesetenv = __fesetenv
! 
! #pragma weak feholdexcept96 = __feholdexcept96
! #pragma weak feupdateenv96 = __feupdateenv
! #pragma weak fegetenv96 = __fegetenv
! #pragma weak fesetenv96 = __fesetenv
  
- #include "fenv_synonyms.h"
  #include <fenv.h>
  #include <ucontext.h>
  #include <thread.h>
  #include "fex_handler.h"
  #include "fenv_inlines.h"
--- 25,45 ----
  /*
   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
! #pragma weak __fex_merge_flags = fex_merge_flags
  
! #pragma weak __feholdexcept = feholdexcept
! #pragma weak __feupdateenv = feupdateenv
! #pragma weak __fegetenv = fegetenv
! #pragma weak __fesetenv = fesetenv
! 
! #pragma weak feupdateenv96 = feupdateenv
! #pragma weak fegetenv96 = fegetenv
! #pragma weak fesetenv96 = fesetenv
  
  #include <fenv.h>
  #include <ucontext.h>
  #include <thread.h>
  #include "fex_handler.h"
  #include "fenv_inlines.h"