Add missing build dependency on dh addon.

Changes-By: lintian-brush
Fixes: lintian: missing-build-dependency-for-dh-addon
See-also: https://lintian.debian.org/tags/missing-build-dependency-for-dh-addon.html

debian/control

@@ -2,7 +2,7 @@ Source: jitsi-prometheus-exporter
 Section: admin
 Priority: optional
 Maintainer: ale <ale@incal.net>
-Build-Depends: debhelper (>= 9), dh-golang, golang-any
+Build-Depends: debhelper (>= 9), dh-golang, golang-any, debhelper (>= 9.20160709~) | debhelper-compat | dh-sequence-systemd |  | dh-systemd
 Standards-Version: 3.9.6
 
 Package: jitsi-prometheus-exporter