Bistream debug tool: Increase maximum queue size.

For 4k resolution videos, number of symbols can be large, and can fill
up the whole queue.

Increase the limit 10x to avoid this issue.

BUG=aomedia:2972

Change-Id: I93049fb53b96932652176c8f65a29da76322d0fc

aom_util/debug_util.c

diff --git a/aom_util/debug_util.c b/aom_util/debug_util.c
index 3e9c314..a9654fa 100644
--- a/aom_util/debug_util.c
+++ b/aom_util/debug_util.c
@@ -32,7 +32,7 @@
 int aom_bitstream_queue_get_frame_read(void) { return frame_idx_r; }
 
 #if CONFIG_BITSTREAM_DEBUG
-#define QUEUE_MAX_SIZE 2000000
+#define QUEUE_MAX_SIZE 20000000
 static int result_queue[QUEUE_MAX_SIZE];
 static int nsymbs_queue[QUEUE_MAX_SIZE];
 static aom_cdf_prob cdf_queue[QUEUE_MAX_SIZE][16];