Add Guix step including bootstrap bin, build guix, build iso and fix some small bug

steps-guix/guix-hash-compat-1.5.0/pass1.sh

@@ -0,0 +1,34 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+src_prepare() {
+    default
+}
+
+src_configure() {
+    :
+}
+
+src_compile() {
+    :
+}
+
+src_install() {
+    local compat_src
+    compat_src="${DESTDIR}/usr/libexec/guix-hash-compat/guix-1.5.0"
+
+    mkdir -p "${compat_src}"
+    cp -a . "${compat_src}/"
+
+    install -D -m 0755 /dev/stdin "${DESTDIR}/usr/bin/guix-hash-compat" <<'EOS'
+#!/bin/sh
+set -e
+
+src_dir="/usr/libexec/guix-hash-compat/guix-1.5.0"
+if [ -d /tmp/guix-1.5.0 ]; then
+    src_dir="/tmp/guix-1.5.0"
+fi
+
+cd "${src_dir}"
+exec ./pre-inst-env guix hash "$@"
+EOS
+}

steps-guix/guix-hash-compat-1.5.0/sources

@@ -0,0 +1 @@
+f https://ftpmirror.gnu.org/gnu/guix/guix-1.5.0.tar.gz df2102eed00aff0b17275654a42f094c8a1117ec065884eb1ff76005e47415c5