winegstreamer: Handle EnableDiscreteOutput and SpeakerConfig settings in WMSyncReader_SetOutputSetting().

Resident Evil 5 cutscenes have audio and don't hang.
Signed-off-by: Andrey Gusev <andrey.goosev@gmail.com>
Signed-off-by: Zebediah Figura <zfigura@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>