d/changelog: generate entry for arptables_0.0.4+snapshot20181021-4

New changelog entry.

Git-Dch: Ignore
Signed-off-by: Alberto Molina Coballes <alb.molina@gmail.com>
6 jobs for master in 5 minutes and 55 seconds (queued for 2 seconds)
latest
Status Job ID Name Coverage
  Build
passed #185847
build

00:02:34

 
  Test
passed #185850
autopkgtest

00:01:45

passed #185851
blhc

00:01:22

passed #185849
lintian

00:01:45

passed #185852
piuparts

00:03:19

passed #185848
reprotest

00:02:19