Remove qtjsbackend from Qt 5.2.0

This module is not needed anymore and won't be part of future installers.

Change-Id: I881db71ffaaa5b0a1f261ecced74dddde3dfdbab
Reviewed-by: Iikka Eklund <iikka.eklund@digia.com>
Add 5.2.0 installer and repository configs for desktop and Android

Change-Id: I576abea5321f6f3346609e60ee492310af8a2051
Reviewed-by: Sergio Ahumada <sergio.ahumada@digia.com>
Fix installer name on Mac

On Mac the installer name has to have '.app' appended into filename.

Change-Id: Ic90b8e59756e6643a614761e66c68b5bb0803fed
Reviewed-by: Matti Paaso <matti.paaso@digia.com>
Reviewed-by: Sergio Ahumada <sergio.ahumada@digia.com>