5261 libm should stop using synonyms.h

*** 25,39 ****
  /*
   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
! #pragma weak aintf = __aintf
! #pragma weak anintf = __anintf
! #pragma weak irintf = __irintf
! #pragma weak nintf = __nintf
! #pragma weak rintf = __rintf
  
  /* INDENT OFF */
  /*
   * aintf(x)     return x chopped to integral value
   * anintf(x)    return sign(x)*(|x|+0.5) chopped to integral value
--- 25,35 ----
  /*
   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
! #pragma weak __rintf = rintf
  
  /* INDENT OFF */
  /*
   * aintf(x)     return x chopped to integral value
   * anintf(x)    return sign(x)*(|x|+0.5) chopped to integral value