Make ducky_encode use display order hint

Use the display order hint as the global display index.

Change-Id: I954659d2f3ef8047836671ef1fae9a6f727a2c0a

av1/encoder/encoder.c

diff --git a/av1/encoder/encoder.c b/av1/encoder/encoder.c
index 7163d91..c5901d4 100644
--- a/av1/encoder/encoder.c
+++ b/av1/encoder/encoder.c
@@ -3166,7 +3166,7 @@
     PSNR_STATS psnr;
     aom_calc_psnr(cpi->source, &cpi->common.cur_frame->buf, &psnr);
     DuckyEncodeFrameResult *frame_result = &cpi->ducky_encode_info.frame_result;
-    frame_result->global_order_idx = cm->cur_frame->order_hint;
+    frame_result->global_order_idx = cm->cur_frame->display_order_hint;
     frame_result->q_index = cm->quant_params.base_qindex;
     frame_result->rdmult = cpi->rd.RDMULT;
     frame_result->rate = (int)(*size) * 8;
@@ -3548,7 +3548,7 @@
       aom_calc_psnr(cpi->source, &cpi->common.cur_frame->buf, &psnr);
       DuckyEncodeFrameResult *frame_result =
           &cpi->ducky_encode_info.frame_result;
-      frame_result->global_order_idx = cm->cur_frame->order_hint;
+      frame_result->global_order_idx = cm->cur_frame->display_order_hint;
       frame_result->q_index = cm->quant_params.base_qindex;
       frame_result->rdmult = cpi->rd.RDMULT;
       frame_result->rate = (int)(*size) * 8;