fa0a4bde3f
This appears to fix the sim-eng build on the gDapper build machines. Basic problem is that LayerBuffer::OverlaySource has a constructor that calls SurfaceFlinger.signalEvent(). SurfaceFlinger lists LayerBuffer as a friend, but that's not enough to convince gcc that the embedded OverlaySource class is also a friend. I don't see a way to make them friendly, so I marked signalEvent() as public.