Add native Windows binary for bison.

bison/src/bison/2.4.1/bison-2.4.1-src/m4/strverscmp.m4

Index: bison/src/bison/2.4.1/bison-2.4.1-src/m4/strverscmp.m4
===================================================================
--- bison/src/bison/2.4.1/bison-2.4.1-src/m4/strverscmp.m4	(revision 0)
+++ bison/src/bison/2.4.1/bison-2.4.1-src/m4/strverscmp.m4	(revision 0)
@@ -0,0 +1,24 @@
+# strverscmp.m4 serial 6
+dnl Copyright (C) 2002, 2005, 2006, 2007, 2008 Free Software
+dnl Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_STRVERSCMP],
+[
+  dnl Persuade glibc <string.h> to declare strverscmp().
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+  AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS])
+  AC_REPLACE_FUNCS(strverscmp)
+  if test $ac_cv_func_strverscmp = no; then
+    gl_PREREQ_STRVERSCMP
+    HAVE_STRVERSCMP=0
+  fi
+])
+
+# Prerequisites of lib/strverscmp.c.
+AC_DEFUN([gl_PREREQ_STRVERSCMP], [
+  :
+])