libvpx: Pull from upstream

source/libvpx/examples/vpx_temporal_svc_encoder.c

Index: source/libvpx/examples/vpx_temporal_svc_encoder.c
diff --git a/source/libvpx/examples/vpx_temporal_svc_encoder.c b/source/libvpx/examples/vpx_temporal_svc_encoder.c
index 7a582d2b8502b67f3291e346f610839b679975ef..dea29c0214c76d6c4fe5d1e1a7549182aa4a5867 100644
--- a/source/libvpx/examples/vpx_temporal_svc_encoder.c
+++ b/source/libvpx/examples/vpx_temporal_svc_encoder.c
@@ -610,6 +610,9 @@ int main(int argc, char **argv) {
   cfg.rc_buf_optimal_sz = 600;
   cfg.rc_buf_sz = 1000;
 
+  // Use 1 thread as default.
+  cfg.g_threads = 1;
+
   // Enable error resilient mode.
   cfg.g_error_resilient = 1;
   cfg.g_lag_in_frames   = 0;
@@ -675,6 +678,7 @@ int main(int argc, char **argv) {
       vpx_codec_control(&codec, VP9E_SET_FRAME_PERIODIC_BOOST, 0);
       vpx_codec_control(&codec, VP9E_SET_NOISE_SENSITIVITY, 0);
       vpx_codec_control(&codec, VP8E_SET_STATIC_THRESHOLD, 0);
+      vpx_codec_control(&codec, VP9E_SET_TILE_COLUMNS, (cfg.g_threads >> 1));
       if (vpx_codec_control(&codec, VP9E_SET_SVC, layering_mode > 0 ? 1: 0)) {
         die_codec(&codec, "Failed to set SVC");
     }