Use androiddeployqt to install the package when using Qt >= 5.4

On Qt < 5.4 androiddeployqt can't be used to only install the package
(and qt libs if the debug deployment was chose).

Change-Id: Ia7939e7988163ec04bdc7a927fd3a89e4d824782
Reviewed-by: Daniel Teske <daniel.teske@digia.com>