Adding app_label to xproto

Change-Id: I97e032230d8e67b06e9dd22e8ddcc8bc430cd678
(cherry picked from commit 296e3c85dc5938e1414e23e71d011488fad5f27f)
diff --git a/xos/vrouter.xproto b/xos/vrouter.xproto
index 1d1c60a..8c2da1d 100644
--- a/xos/vrouter.xproto
+++ b/xos/vrouter.xproto
@@ -1,6 +1,7 @@
 option kind="vROUTER";
 option name="vrouter";
 option legacy="True";
+option app_label = "vrouter";
 
 message VRouterService (Service){
      option verbose_name="vRouter Service";