readline: Add upstream patch. * src/readline-0-001.patch: Add upstream patch (reformatted to apply in MXE): ftp://ftp.gnu.org/pub/gnu/readline/readline-8.1-patches * dist-files.mk: Include new file in list.

#!/usr/bin/env bash

prog=$1

if [ -z $prog ]; then
  echo "Missing program name" >&2
  exit 1
fi

cat << EOF
@echo off
set BINPATH=%~dp0
%BINPATH%bash -c '$prog %*'
EOF