netlink: add a link between vlan intf and its parent
netlink: add a link between vlan intf and its parent

Change-Id: I6a11786c2ce94123b5a2212104b9c34eca42724c

safchain/skydive,safchain/skydive,skydive-project/skydive,redhat-cip/skydive,safchain/skydive,lebauce/skydive,safchain/skydive,safchain/skydive,skydive-project/skydive,lebauce/skydive,lebauce/skydive,skydive-project/skydive,lebauce/skydive,safchain/skydive,lebauce/skydive,skydive-project/skydive,redhat-cip/skydive,lebauce/skydive,lebauce/skydive,redhat-cip/skydive,skydive-project/skydive,lebauce/skydive,safchain/skydive,skydive-project/skydive,safchain/skydive,skydive-project/skydive