fix init_head for busybox + do not use strip and upx, there was problems, additions glibc should not be stripped so if stripping do it only on binaries + m + fix fs-cleanup

Signed-off-by: Mattias Andrée <maandree@operamail.com>
fix and improve PS1 for emergence shell

Signed-off-by: Mattias Andrée <maandree@operamail.com>