Writable oci hooks directory for CoreOS

[zvonkok]

Is this a BUG REPORT or FEATURE REQUEST?:

[//]: # kind feature

Description

When using docker in CoreOS I want to be able to install runtime hooks (prestart, poststart) into the
filesystem. Currently docker only reads hooks from /usr/libexec/oci/hooks.d, which is not writable.

Is it possible to create a new directory that would be writable e.g. /etc/libexec/oci/hooks.d and make podman aware of it?