rootfs.py refactoring.

Switch to bzip2 packages
Move most of the preprocessing done by rootfs.py
into kaem and bash scripts inside live-bootstrap.

sysa/bzip2-1.0.8/bzip2-1.0.8.kaem

@@ -7,10 +7,11 @@
 
 set -ex
 
-mkdir build
+mkdir build src
 cd build 
 
 # Extract
+cp ${sources}/${pkg}.tar.gz ../src/
 gunzip -f ../src/${pkg}.tar.gz
 tar xf ../src/${pkg}.tar
 cd ${pkg}

sysa/bzip2-1.0.8/bzip2-1.0.8.sh

@@ -1,13 +1,9 @@
 # SPDX-FileCopyrightText: 2021 Paul Dersey <pdersey@gmail.com>
 # SPDX-FileCopyrightText: 2022 fosslinux <fosslinux@aussies.space>
+# SPDX-FileCopyrightText: 2022 Andrius Štikonas <andrius@stikonas.eu>
 #
 # SPDX-License-Identifier: GPL-3.0-or-later
 
-src_unpack() {
-    src_dir="${base_dir}/src"
-    tar -xf "${src_dir}/${pkg}.tar"
-}
-
 src_prepare() {
     :
 }