Add a snapshot of flutter/engine/src/build to our sdk

build/module_args/v8.gni

Index: build/module_args/v8.gni
diff --git a/build/module_args/v8.gni b/build/module_args/v8.gni
new file mode 100644
index 0000000000000000000000000000000000000000..8b5204c68ec46e1e9518c3be268a7dceb5d0368c
--- /dev/null
+++ b/build/module_args/v8.gni
@@ -0,0 +1,13 @@
+# Copyright 2014 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.
+
+if (is_android) {
+  import("//build/config/android/config.gni")
+}
+
+# TODO(sky): nuke this. Temporary while sorting out http://crbug.com/465456.
+enable_correct_v8_arch = false
+
+v8_use_external_startup_data = !(is_chromeos || is_win)
+v8_extra_library_files = []