Update brotli to version 1.0.9

C/brotli/br_platform.c

@@ -0,0 +1,22 @@
+/* Copyright 2016 Google Inc. All Rights Reserved.
+
+   Distributed under MIT license.
+   See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
+*/
+
+#include <stdlib.h>
+
+#include "./common/platform.h"
+#include "types.h"
+
+/* Default brotli_alloc_func */
+void* BrotliDefaultAllocFunc(void* opaque, size_t size) {
+  BROTLI_UNUSED(opaque);
+  return malloc(size);
+}
+
+/* Default brotli_free_func */
+void BrotliDefaultFreeFunc(void* opaque, void* address) {
+  BROTLI_UNUSED(opaque);
+  free(address);
+}