Add SMPP support in the debian build, include libsmpp34-dev as a dependency.
diff --git a/debian/rules b/debian/rules
index 14e8cec..8047b79 100755
--- a/debian/rules
+++ b/debian/rules
@@ -37,5 +37,5 @@
 
 override_dh_auto_configure:
 	echo $(VERSION) > openbsc/.tarball-version
-	dh_auto_configure --sourcedirectory=openbsc -- --enable-nat --enable-osmo-bsc
+	dh_auto_configure --sourcedirectory=openbsc -- --enable-nat --enable-osmo-bsc --enable-smpp