This test calls iptables to set a new packet filter using a shared
library libxt_standard.so. Unfortunately, depending on the
distribution we are running on, this shared library may be stored on a
different place.

This patch allows this test to be run on Debian like systems.
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>