File rl_json/build.sh from the latest check-in

#! /usr/bin/env bash

# BuildCompatible: KitCreator

version='0.11.0'
url="https://github.com/RubyLane/rl_json/archive/refs/tags/${version}.tar.gz"
sha256='5f711c3196da5acec01bb24a76404a7f25f5f2f4b939aaa874bd7a7e94e482e1'