Bump dpkg-dev and debhelper build-dep to make lintian happy

This is not really needed anymore, as those are in stable,
but as they are versioned already, let's just do it.

Gbp-Dch: ignore

debian/control

@@ -5,7 +5,7 @@ Maintainer: APT Development Team <deity@lists.debian.org>
 Uploaders: Michael Vogt <mvo@debian.org>,
  Julian Andres Klode <jak@debian.org>
 Standards-Version: 3.9.6
-Build-Depends: dpkg-dev (>= 1.15.8), debhelper (>= 8.1.3~), libdb-dev,
+Build-Depends: dpkg-dev (>= 1.17.14), debhelper (>= 9.20141010), libdb-dev,
  gettext (>= 0.12), libcurl4-gnutls-dev (>= 7.19.4~),
  zlib1g-dev, libbz2-dev, liblzma-dev, liblz4-dev,
  xsltproc, docbook-xsl, docbook-xml, po4a (>= 0.34-2),