Port folder renaming changes from AOM

Manually cherry-picked commits:
ceef058 libvpx->libaom part2
3d26d91 libvpx -> libaom
cfea7dd vp10/ -> av1/
3a8eff7 Fix a build issue for a test
bf4202e Rename vpx to aom

Change-Id: I1b0eb5a40796e3aaf41c58984b4229a439a597dc
diff --git a/aom_util/debug_util.c b/aom_util/debug_util.c
new file mode 100644
index 0000000..5fe88db
--- /dev/null
+++ b/aom_util/debug_util.c
@@ -0,0 +1,59 @@
+/*
+ *  Copyright (c) 2016 The WebM project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "aom_util/debug_util.h"
+#include <assert.h>
+#include <stdio.h>
+#if CONFIG_BITSTREAM_DEBUG
+#define QUEUE_MAX_SIZE 2000000
+static int result_queue[QUEUE_MAX_SIZE];
+static int prob_queue[QUEUE_MAX_SIZE];
+static int queue_r = 0;
+static int queue_w = 0;
+static int queue_prev_w = -1;
+static int skip_r = 0;
+static int skip_w = 0;
+
+void bitstream_queue_set_skip_write(int skip) { skip_w = skip; }
+
+void bitstream_queue_set_skip_read(int skip) { skip_r = skip; }
+
+void bitstream_queue_record_write(void) { queue_prev_w = queue_w; }
+
+void bitstream_queue_reset_write(void) { queue_w = queue_prev_w; }
+
+int bitstream_queue_get_write(void) { return queue_w; }
+
+int bitstream_queue_get_read(void) { return queue_r; }
+
+void bitstream_queue_pop(int *result, int *prob) {
+  if (!skip_r) {
+    if (queue_w == queue_r) {
+      printf("buffer underflow queue_w %d queue_r %d\n", queue_w, queue_r);
+      assert(0);
+    }
+    *result = result_queue[queue_r];
+    *prob = prob_queue[queue_r];
+    queue_r = (queue_r + 1) % QUEUE_MAX_SIZE;
+  }
+}
+
+void bitstream_queue_push(int result, int prob) {
+  if (!skip_w) {
+    result_queue[queue_w] = result;
+    prob_queue[queue_w] = prob;
+    queue_w = (queue_w + 1) % QUEUE_MAX_SIZE;
+    if (queue_w == queue_r) {
+      printf("buffer overflow queue_w %d queue_r %d\n", queue_w, queue_r);
+      assert(0);
+    }
+  }
+}
+#endif  // CONFIG_BITSTREAM_DEBUG