Issue #1288 - Part 1a: Update brotli to 1.0.7

This also reorganizes the exports in the build system to use `brotli/`
as include directory.

modules/brotli/enc/encoder_dict.h

@@ -0,0 +1,41 @@
+/* Copyright 2017 Google Inc. All Rights Reserved.
+
+   Distributed under MIT license.
+   See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
+*/
+
+#ifndef BROTLI_ENC_ENCODER_DICT_H_
+#define BROTLI_ENC_ENCODER_DICT_H_
+
+#include "../common/dictionary.h"
+#include "../common/platform.h"
+#include <brotli/types.h>
+#include "./static_dict_lut.h"
+
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
+
+/* Dictionary data (words and transforms) for 1 possible context */
+typedef struct BrotliEncoderDictionary {
+  const BrotliDictionary* words;
+
+  /* cut off for fast encoder */
+  uint32_t cutoffTransformsCount;
+  uint64_t cutoffTransforms;
+
+  /* from dictionary_hash.h, for fast encoder */
+  const uint16_t* hash_table;
+
+  /* from static_dict_lut.h, for slow encoder */
+  const uint16_t* buckets;
+  const DictWord* dict_words;
+} BrotliEncoderDictionary;
+
+BROTLI_INTERNAL void BrotliInitEncoderDictionary(BrotliEncoderDictionary* dict);
+
+#if defined(__cplusplus) || defined(c_plusplus)
+}  /* extern "C" */
+#endif
+
+#endif  /* BROTLI_ENC_ENCODER_DICT_H_ */