We were relying on running ca-certificates from the -native version. This
meant the host and target path layouts had to match which might not be true,
it certainly isn't true for the sdk builds.
There was a dependency on run-parts which wasn't represented (we can get it
from busybox or debianutils).
Since this is an allarch script, call the script directly, making sure debianutils
and openssl are available as postinst rootfs time to resolve the issues.
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
