Fixed QtSensors example namespace compilation.
Fixed QtSensors example namespace compilation.

Explicitly include QTimer.

Change-Id: I24667b038106854d39f83fad8cf11225b153df79
Sanity-Review: Qt Sanity Bot <5581206bb7e0307f0d99eb71898ae6b694149ca5@ovi.com>
Reviewed-by: Rohan McGovern <d75463945f40a9669160a73cef2843e56b22c602@nokia.com>

mer-qt/qtsensors,mer-qt/qtsensors,kobolabs/qtsensors,mer-qt/qtsensors,kobolabs/qtsensors,richardmg/qtsensors,richardmg/qtsensors,kobolabs/qtsensors,mer-qt/qtsensors,richardmg/qtsensors,richardmg/qtsensors,richardmg/qtsensors,kobolabs/qtsensors,mer-qt/qtsensors