Build drivers with bazel

Change-Id: I033ac32b3ef8119fc65e046c821ff17f12709261
diff --git a/apps/flowspec-api/flowapi/BUILD b/apps/flowspec-api/flowapi/BUILD
new file mode 100644
index 0000000..8d87120
--- /dev/null
+++ b/apps/flowspec-api/flowapi/BUILD
@@ -0,0 +1,4 @@
+osgi_jar_with_tests(
+    test_deps = TEST_ADAPTERS,
+    deps = CORE_DEPS,
+)