temporal_svc encoder: Change default setting for layering_mode = 0.

Change-Id: I5f723ada144d0bd82ee700ef28a4916fd64ba5e4

examples/vpx_temporal_svc_encoder.c

@@ -671,7 +671,7 @@ int main(int argc, char **argv) {
       vpx_codec_control(&codec, VP9E_SET_AQ_MODE, 3);
       vpx_codec_control(&codec, VP9E_SET_FRAME_PERIODIC_BOOST, 0);
       vpx_codec_control(&codec, VP9E_SET_NOISE_SENSITIVITY, 0);
-      if (vpx_codec_control(&codec, VP9E_SET_SVC, 1)) {
+      if (vpx_codec_control(&codec, VP9E_SET_SVC, layering_mode > 0 ? 1: 0)) {
         die_codec(&codec, "Failed to set SVC");
     }
   }