This postinst can fail depending on host setup, which makes non-deterministic
build on different host.
Use postinst ontarget to always fail at do_rootfs and rerun at target first
boot.
In this situation, remove postfix-native from PACKAGE_WRITE_DEPS
Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>