Build-depend on recent dpkg-dev version for for minimal restriction formula support

Also make lintian happy.

debian/control

@@ -5,6 +5,7 @@ Maintainer: Christoph Biedl <debian.axhn@manchmal.in-ulm.de>
 Build-Depends: debhelper (>= 9.20141010~),
     dh-autoreconf,
     dh-python,
+    dpkg-dev (>= 1.17.14~),
     python-all,
     python3-all,
     zlib1g-dev,

debian/source.lintian-overrides

@@ -0,0 +1,4 @@
+
+# Bug#797951
+file source: restriction-formula-without-versioned-dpkg-dev-dependency
+file source: restriction-formula-with-debhelper-without-debhelper-version