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 asinl = __asinl
  
  /*
   *      asinl(x) = atan2l(x,sqrt(1-x*x));
   *
   * For better accuracy, 1-x*x is computed as follows
--- 25,35 ----
  /*
   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
! #pragma weak __asinl = asinl
  
  /*
   *      asinl(x) = atan2l(x,sqrt(1-x*x));
   *
   * For better accuracy, 1-x*x is computed as follows