Bazel build of ONOS GUI package

Change-Id: Id5f9931c38f82afcdcefc49171dd79f2f5bdad14
diff --git a/tools/build_rules/prelude_bazel b/tools/build_rules/prelude_bazel
index 842e116..3c71020 100644
--- a/tools/build_rules/prelude_bazel
+++ b/tools/build_rules/prelude_bazel
@@ -18,3 +18,6 @@
 load("//tools/build/bazel:onos_app.bzl", "onos_app")
 
 generated_java_libraries()
+
+
+