package loadtest app via buck

Change-Id: I23cc7a140c01a7ee3988c4e1e28122c218323e23
(cherry picked from commit 1e60faf2a355d5a9a918b451421c58b37146709c)
diff --git a/tools/package/BUCK b/tools/package/BUCK
index 0630674..2fb2b8d 100644
--- a/tools/package/BUCK
+++ b/tools/package/BUCK
@@ -73,6 +73,7 @@
   '//apps/test/election:onos-apps-test-election-oar',
   '//apps/test/distributed-primitives:onos-apps-test-distributed-primitives-oar',
   '//apps/test/intent-perf:onos-apps-test-intent-perf-oar',
+  '//apps/test/loadtest:onos-apps-test-loadtest-oar',
   '//apps/test/demo:onos-apps-test-demo-oar',
 ]