Blindly recursive chown is not way to do it.
This Workaround is not much better than just chown -R but
there is small adjustment just chown MariaDB statedir and logdir
then with find only chown those files that are not correctly
owned.

Fixes lintian warnings:
 * W: mariadb-server: recursive-privilege-change "chown -R" [postinst:*]
 * W: mariadb-server: recursive-privilege-change "chown -R" [postinst:*]