Debian: Depend on libosmo-sigtran-dev, not libsomo-sccp-dev!

Change-Id: I478e28ba5f7e39cecea8912183e288ecb2f03337
diff --git a/debian/control b/debian/control
index 4f0aafb..c017e16 100644
--- a/debian/control
+++ b/debian/control
@@ -15,7 +15,7 @@
                libsmpp34-dev,
                libasn1c-dev,
                libosmocore-dev,
-               libosmo-sccp-dev,
+               libosmo-sigtran-dev,
                libosmo-abis-dev,
                libosmo-mgcp-client-dev,
                libosmo-netif-dev,