Thanks to everyone here that posted. We just flew into HKG for the normal 07L landing. During the arrival, ATC changed our arrival and told us to land on 07R. They gave us the verbal GS warning, as described above. We saw an Emirates aircraft approaching the hold short line, which could disrupt the GS signal. We turned off the autopilot, and followed the PAPIs just in case the GS signal was disrupted, and landed uneventfully. The EK aircraft did not get near the hold short line before we landed, and we saw no GS distruption.