With the previous modifications, a temporary directory is created
to mount the rootfs in order to have the system container to remount
itself the '/' directory.

But in case of daemonize, we change the directory, so when the rootfs
is specified with a relative path, we can not access it.

Don't chdir, as that will be done automatically later in the chroot
setup.
Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>