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

steps-guix/bash-4.4.23-1/pass1.sh

@@ -0,0 +1,23 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+SEED_PREFIX="/bootstrap-seeds/bash-4.4.23-1"
+
+src_configure() {
+    ./configure \
+        --prefix="${SEED_PREFIX}" \
+        --without-bash-malloc \
+        --disable-nls \
+        --enable-static-link \
+        --build="${TARGET}" \
+        bash_cv_dev_stdin=absent \
+        bash_cv_dev_fd=whacky
+}
+
+src_compile() {
+    make -j1
+}
+
+src_install() {
+    install -D -m 0755 bash "${DESTDIR}${SEED_PREFIX}/bin/bash"
+    ln -sf bash "${DESTDIR}${SEED_PREFIX}/bin/sh"
+}

steps-guix/bash-4.4.23-1/sources

@@ -0,0 +1 @@
+f https://ftp.gnu.org/gnu/bash/bash-4.4.tar.gz d86b3392c1202e8ff5a423b302e6284db7f8f435ea9f39b5b1b20fd3ac36dfcb