init.sh: Fix warning & cleanup

* All commands need to be executed from busybox
* Remove date from log (useless)

Change-Id: I4583a730a16dab923734fc8ae86db63961ce6bdf
(cherry picked from commit 4ee9b57fcff853a48cb801a4601ed17bf7608b73)
(cherry picked from commit f096414797a44db94c3ec16056ae5b01f3778e89)