Update brotli to v1.0.0-snapshot.

third_party/brotli/brotli.gni

 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/compiled_action.gni")
 
 # Compresses a file with brotli.
 #
 # Variables
 #   input_file: Path to input file.
 #   output_file: Path to output file.
 #
 template("compress_file_brotli") {
   compiled_action(target_name) {
     forward_variables_from(invoker,
                            [
                              "deps",
                              "testonly",
                            ])
     tool = "//third_party/brotli:bro"
     inputs = [
       invoker.input_file,
     ]
     outputs = [
       invoker.output_file,
     ]
     args = [
       "--force",
+      "--no-copy-stat",
       "--input",
       rebase_path(invoker.input_file, root_build_dir),
       "--output",
       rebase_path(invoker.output_file, root_build_dir),
     ]
   }
 }