ref: 22dcecd3d87149c416bc0258920d78db8048de58
parent: 87386826a95fda953162050a27f2506d8c1f3db5
author: Jerome Jiang <jianj@google.com>
date: Wed Jun 6 11:44:01 EDT 2018
VP9 SVC: Write out svc src for all spatial layers. Change-Id: Ie78676e4df75f3f870ee2de0c87a8167b7ec68e0