iptraf: Fix rootfs creation errors

fix errors as following:
       file /var/run from install of iptraf-3.0.0-r0.x86_64
       conflicts with file from package base-files-3.0.14-r89.ubinux_x86_64

Signed-off-by: Dai Caiyun <daicy.fnst@cn.fujitsu.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
(cherry picked from commit e49c2c2ba054cc8aa266f71e6204707cadd0f044)
Signed-off-by: Armin Kuster <akuster808@gmail.com>