Fix dhcprelay dependency, for BUCK

Change-Id: I86117d3590ded3bd6fe1bdbe8ccd6508cd27ec11
diff --git a/apps/dhcprelay/BUCK b/apps/dhcprelay/BUCK
index a2bfb70..0ab90d1 100644
--- a/apps/dhcprelay/BUCK
+++ b/apps/dhcprelay/BUCK
@@ -31,6 +31,9 @@
     category = 'Utility',
     url = 'http://onosproject.org',
     description = 'DHCP Relay Agent Application.',
-    required_apps = [ 'org.onosproject.route-service' ],
+    required_apps = [
+        'org.onosproject.route-service',
+        'org.onosproject.fpm',
+    ],
     included_bundles = BUNDLES,
 )