Mark tst_QVectorArray as insignificant on Linux

Task-number: QTBUG-37334
Change-Id: I231de24945f611bb421cc7fafc83dcd81417171d
Reviewed-by: Fabian Bumberger <fbumberger@rim.com>
Fix Qt3D build

Change-Id: I2264b3261d202748aca29bab552dd8896bae25e5
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>