build.sh reorganization
- Fixes for the
baselineprofile, FS#64236. - The
rootuser is now listed in custom/etc/passwdand/etc/shadowfiles. This allows to get rid ofusermodandpasswdcommands fromcustomize_airootfs.sh. This requireschmoding inbuild.sh. - Custom
airootfsfiles are copied to working directory before packages are installed. - All packages are installed in one go.