oops, adding a test file from a few tests ago

tools/tests/apps/package-tests/packages/contains-plugin/package2.js

@@ -0,0 +1,16 @@
+Package.describe({
+  summary: "contains a plugin",
+  version: "1.1.0"
+});
+
+Package._transitional_registerBuildPlugin({
+  name: "myPlugin",
+  use: [],
+  sources: [
+    'plugin/plugin.js'
+  ],
+});
+
+Package.on_use(function (api) {
+  api.use('accounts-base');
+});