Add native Windows binary for bison.

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

+/* Subprocesses with pipes.
+   Copyright (C) 2002, 2004, 2005 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/>.  */
+
+/* Written by Paul Eggert <eggert@twinsun.com>
+   and Florian Krohm <florian@edamail.fishkill.ibm.com>.  */
+
+#if HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+
+void init_subpipe (void);
+pid_t create_subpipe (char const * const *, int[2]);
+void end_of_output_subpipe (pid_t, int[2]);
+void reap_subpipe (pid_t, char const *);
+#ifdef _WIN32
+# include <io.h>
+# include <fcntl.h>
+# define pipe(a) _pipe((a), 0, O_NOINHERIT)
+#endif