Add redox installation script

Author: coolreader18

redox_recipe.sh

@@ -0,0 +1,9 @@
+GIT=https://github.com/RustPython/RustPython
+BRANCH=redox
+CARGOFLAGS=--no-default-features
+
+function recipe_stage() {
+  dest="$(realpath "$1")"
+  mkdir -pv "$dest/lib/"
+  cp -r Lib "$dest/lib/rustpython"
+}

redux-install.sh

@@ -0,0 +1,32 @@
+#!/bin/bash
+
+set -e
+
+DIR=$(dirname "$0")
+
+case $# in
+0) ;;
+1)
+	cd "$1"
+	;;
+*)
+	echo "Too many arguments" >&2
+	exit 1
+	;;
+esac
+
+if [[ ! -d cookbook ]]; then
+	echo "You do not appear to be in a redox checkout (no 'cookbook' directory). " \
+		"Please run this script from or specify as an argument the root of your redox checkout." >&2
+	exit 1
+fi
+
+mkdir -p cookbook/recipes/rustpython
+
+cp "$DIR"/redox_recipe.sh cookbook/recipes/rustpython/recipe.sh
+
+if ! grep -q -w rustpython filesystem.toml; then
+	sed -i 's/\[packages\]/[packages]\nrustpython = {}/' filesystem.toml
+fi
+
+echo "All done! Run 'make qemu' to rebuild and run with rustpython installed."