Don't rebuild application for android when something is changed in App_Resources/iOS

[Fatme]

Please, provide the details below:

Tell us about the problem

In case when some change occurs in App_Resources/iOS and tns run android command is executed, the application is fully rebuild.
In case when some change occurs in App_Resources/Android and tns run ios command is executed, the application is fully rebuild.

Which platform(s) does your issue occur on?

Both

Please tell us how to recreate the issue in as much detail as possible.

Steps to reproduce:

1. Create new project
2. Execute tns run ios
3. Execute again tns run ios - you should see Skipping prepare... message
4. Make some change inside App_Resources/Android folder - touch some file for example
5. Run again tns run ios command - You'll see the application is rebuild but actually no build is necessary.

[Natalia-Hristova]

Now only

Skipping prepare.
Successfully synced application....

is shown.

This fix will be available in the next official version of nativescript.