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

steps-guix/coreutils-8.30/pass1.sh

@@ -0,0 +1,23 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+SEED_PREFIX="/bootstrap-seeds/coreutils-8.30"
+
+src_configure() {
+    FORCE_UNSAFE_CONFIGURE=1 ./configure \
+        --prefix="${SEED_PREFIX}" \
+        --disable-nls \
+        --disable-silent-rules \
+        --enable-no-install-program=stdbuf,libstdbuf.so \
+        CFLAGS="-Os -g0" \
+        LDFLAGS="-static -pthread" \
+        gl_cv_func_getcwd_path_max="no, but it is partly working" \
+        gl_cv_prog_perl="no"
+}
+
+src_compile() {
+    make "${MAKEJOBS}" MAKEINFO=true GPERF=true
+}
+
+src_install() {
+    make DESTDIR="${DESTDIR}" MAKEINFO=true install
+}

steps-guix/coreutils-8.30/sources

@@ -0,0 +1 @@
+f https://mirrors.kernel.org/gnu/coreutils/coreutils-8.30.tar.xz e831b3a86091496cdba720411f9748de81507798f6130adeaef872d206e1b057