debian/control: put build-depends in own lines

Related: OS#5223
Change-Id: I5d085695d4bdd2aaac4105c129e423d27be63a3e
diff --git a/debian/control b/debian/control
index 0f4c286..e630326 100644
--- a/debian/control
+++ b/debian/control
@@ -2,7 +2,15 @@
 Section: net
 Priority: optional
 Maintainer: Holger Hans Peter Freyther <holger@freyther.de>
-Build-Depends: debhelper (>= 9), autotools-dev, pkg-config, libosmocore-dev, libosmo-sccp-dev, dh-autoreconf, dh-systemd (>= 1.5), libsnmp-dev, libsctp-dev
+Build-Depends: debhelper (>= 9),
+               autotools-dev,
+               pkg-config,
+               libosmocore-dev,
+               libosmo-sccp-dev,
+               dh-autoreconf,
+               dh-systemd (>= 1.5),
+               libsnmp-dev,
+               libsctp-dev
 Standards-Version: 3.9.6
 Homepage: http://openbsc.osmocom.org/
 Vcs-Git: git://bs11-abis.gnumonks.org/cellmgr-ng.git