fix: make NG tests green again

With nativescript-angular@5 we need app.module.ngfactory.d.ts in the
app folder.

Author: dtopuzov

data/apps/livesync-hello-world-ng/app/app.module.ngfactory.d.ts

@@ -0,0 +1,4 @@
+/**
+ * A dynamically generated module when compiled with AoT.
+ */
+export const AppModuleNgFactory: any;