contrib: Build osmo-sgsn with IU support

Change-Id: I810ae848c350550430c1918b3abb4376d21d7317
diff --git a/contrib/jenkins-build-osmo-sgsn.sh b/contrib/jenkins-build-osmo-sgsn.sh
index 4a23b33..87aed76 100755
--- a/contrib/jenkins-build-osmo-sgsn.sh
+++ b/contrib/jenkins-build-osmo-sgsn.sh
@@ -9,6 +9,8 @@
 build_repo libosmo-netif --enable-sanitize --disable-doxygen
 build_repo libosmo-sccp --enable-sanitize
 build_repo osmo-ggsn --enable-sanitize
-build_repo osmo-sgsn --enable-sanitize --disable-iu
+build_repo libasn1c --enable-sanitize
+build_repo osmo-iuh --enable-sanitize
+build_repo osmo-sgsn --enable-sanitize --enable-iu
 
 create_bin_tgz osmo-sgsn