svc_encoder_rtc: Increase golden update for 2 TL

This is for the 2 temporal layer pattern:
increase the GOLDEN refresh from 16 to 32.
This make the reference more useful for uncovered
areas and improves overall quality.

For speed 10 with 2 TL, 70/30 bitrate split,
on rtc_derf:
avg/ovr/ssim, IC% speedup
-1.073/-1.144/-1.332, 0.243

Change-Id: If44a00f6d91bb25b7f5ee5af91f79140b086d17d

examples/svc_encoder_rtc.c

diff --git a/examples/svc_encoder_rtc.c b/examples/svc_encoder_rtc.c
index 161f3f6..9194ed4 100644
--- a/examples/svc_encoder_rtc.c
+++ b/examples/svc_encoder_rtc.c
@@ -721,7 +721,7 @@
         // Refresh lag_index slot, needed for lagging golen.
         ref_frame_config->refresh[lag_index] = 1;
         // Refresh GOLDEN every x base layer frames.
-        if (base_count % 16 == 0) ref_frame_config->refresh[3] = 1;
+        if (base_count % 32 == 0) ref_frame_config->refresh[3] = 1;
       } else {
         layer_id->temporal_layer_id = 1;
         // No updates on layer 1, reference LAST (TL0).