Add native Windows binary for bison.

bison/src/bison/2.4.1/bison-2.4.1-src/m4/stpcpy.m4

Index: bison/src/bison/2.4.1/bison-2.4.1-src/m4/stpcpy.m4
===================================================================
--- bison/src/bison/2.4.1/bison-2.4.1-src/m4/stpcpy.m4	(revision 0)
+++ bison/src/bison/2.4.1/bison-2.4.1-src/m4/stpcpy.m4	(revision 0)
@@ -0,0 +1,26 @@
+# stpcpy.m4 serial 6
+dnl Copyright (C) 2002, 2007 Free Software 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_STPCPY],
+[
+  dnl Persuade glibc <string.h> to declare stpcpy().
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+  dnl The stpcpy() declaration in lib/string.in.h uses 'restrict'.
+  AC_REQUIRE([AC_C_RESTRICT])
+
+  AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS])
+  AC_REPLACE_FUNCS(stpcpy)
+  if test $ac_cv_func_stpcpy = no; then
+    HAVE_STPCPY=0
+    gl_PREREQ_STPCPY
+  fi
+])
+
+# Prerequisites of lib/stpcpy.c.
+AC_DEFUN([gl_PREREQ_STPCPY], [
+  :
+])