refactor(angular5): Declare the app.module.ngfactory.d.ts generated by ngc with AoT (#361)

The angular compiler will generate dynamically the app.module.ngfactory.d.ts.
For plain tsc to compile without errors the main.aot.ts should be compiled without errors,
so app.module.ngfactory.d.ts will provide the necessary type information.

Author: PanayotCankov

demo/AngularApp/app/app.module.ngfactory.d.ts

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

demo/AngularApp/app/main.aot.ts

@@ -2,6 +2,6 @@
 import { platformNativeScript } from "nativescript-angular/platform-static";
 
 // "./app.module.ngfactory" is a dynamically generated module when compiled with AoT.
-const { AppModuleNgFactory } = require("./app.module.ngfactory");
+import { AppModuleNgFactory } from "./app.module.ngfactory";
 
 platformNativeScript().bootstrapModuleFactory(AppModuleNgFactory);