Bump qtsystems version to 5.3.0

Change-Id: Iab43fc52cf69571a3b51432392a1e99cf40d3c8e
Reviewed-by: Sergio Ahumada <sergio.ahumada@digia.com>
Fix simulator compilation

Change-Id: Ie93f12739bc2a2afbba0bf04bcf4132c4aec7bc1
Reviewed-by: Alex Blasche <alexander.blasche@digia.com>