Avoid video playing debug outs in release mode

Please wrap line 1395 in the 'qtmultimedia\src\plugins\wmf\player\mfvideorenderercontrol.cpp':

qDebug() << "currentPresentTime =" << float(currentTime / 10000) * 0.001f << " and sampleTime is" << float(sb.m_time / 10000) * 0.001f;

by:

#ifdef DEBUG_MEDIAFOUNDATION
qDebug() << "currentPresentTime =" << float(currentTime / 10000) * 0.001f << " and sampleTime is" << float(sb.m_time / 10000) * 0.001f;
#endif