Debian: require minimum versions of packages we depend on

I'm using the dame version as in configure.ac to avoid build failures
against older versions of certain packages, such as older libsmpp34.

Change-Id: I83c617fa4e83e2e3d2613e454f517d6031814f21
diff --git a/debian/control b/debian/control
index 12d8364..60d468e 100644
--- a/debian/control
+++ b/debian/control
@@ -11,16 +11,16 @@
                pkg-config,
                libdbi-dev,
                libtalloc-dev,
-               libssl-dev,
-               libsmpp34-dev,
-               libasn1c-dev,
-               libosmocore-dev,
+               libssl-dev (>= 0.9.5),
+               libsmpp34-dev (>= 1.12),
+               libasn1c-dev (>= 0.9.28),
+               libosmocore-dev (>= 0.10.0),
                libosmo-sccp-dev,
-               libosmo-sigtran-dev,
+               libosmo-sigtran-dev (>= 0.8.0),
                libosmo-abis-dev,
-               libosmo-mgcp-client-dev,
-               libosmo-netif-dev,
-               libosmo-ranap-dev
+               libosmo-mgcp-client-dev (>= 1.1.0),
+               libosmo-netif-dev (>= 0.1.0),
+               libosmo-ranap-dev (>= 0.2.0)
 Standards-Version: 3.9.8
 Vcs-Git: git://git.osmocom.org/osmo-msc.git
 Vcs-Browser: https://git.osmocom.org/osmo-msc/