Add native Windows binary for bison.

bison/src/bison/2.4.1/bison-2.4.1-src/lib/libiberty.h

+/* Fake libiberty.h for Bison.
+   Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+
+/* Bison depends on libiberty's implementation of bitsets, which
+   requires a `libiberty.h' file.  This file provides the minimum
+   services.  */
+
+#ifndef BISON_LIBIBERTY_H_
+# define BISON_LIBIBERTY_H_ 1
+
+# ifndef __attribute__
+#  if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 8) || __STRICT_ANSI__
+#   define __attribute__(x)
+#  endif
+# endif
+
+# define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
+
+# include "xalloc.h"
+
+#endif /* ! BISON_LIBIBERTY_H_ */