Update appComponents path to activity

Author: vchimev

webpack.config.js

@@ -16,7 +16,7 @@ module.exports = env => {
     const appComponents = [
         "tns-core-modules/ui/frame",
         "tns-core-modules/ui/frame/activity",
-        resolve(__dirname, "app/activity.android.ts"),
+        "./activity.android.ts",
     ];
 
     const platform = env && (env.android && "android" || env.ios && "ios");