audit: Update patch from upstream feedback

After working with the audit maintainers to get patches accepted, the
following one had to be reworked to meet their standards. This patch
will be included in the next version of audit.

Signed-off-by: Clayton Shotwell <clayton.shotwell@rockwellcollins.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>