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 sinpil = __sinpil
- 
  /* long double sinpil(long double x),
   * return long double precision sinl(pi*x).
   *
   * Algorithm, 10/17/2002, K.C. Ng
   * ------------------------------
--- 25,34 ----
*** 68,78 ****
   * high (tpi_h) and low (tpi_l) parts and call __k_sin/cos(tip_h, tip_lo)
   * instead.
   */
  
  #include "libm.h"
- #include "libm_synonyms.h"
  #include "longdouble.h"
  
  #include <sys/isa_defs.h>
  
  #define I(q, m) ((int *) &(q))[m]
--- 66,75 ----