fix(generate): stop default browser error from ng new --routing

Close angular#2794

Author: Meligy

packages/angular-cli/blueprints/ng2/files/__path__/app/app-routing.module.ts

@@ -1,7 +1,12 @@
 import { NgModule } from '@angular/core';
 import { Routes, RouterModule } from '@angular/router';
 
-const routes: Routes = [];
+const routes: Routes = [
+  {
+    path: '',
+    children: []
+  }
+];
 
 @NgModule({
   imports: [RouterModule.forRoot(routes)],

packages/angular-cli/blueprints/ng2/files/__path__/app/app.component.html

@@ -1,3 +1,4 @@
 <h1>
   {{title}}
-</h1>
+</h1><% if (routing) { %>
+<router-outlet></router-outlet><% } %>