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

build/internal/release_defaults.gypi

Index: build/internal/release_defaults.gypi
diff --git a/build/internal/release_defaults.gypi b/build/internal/release_defaults.gypi
new file mode 100644
index 0000000000000000000000000000000000000000..1bf674ac12165bdb7c56af4e5ef55c8cc7de76b6
--- /dev/null
+++ b/build/internal/release_defaults.gypi
@@ -0,0 +1,18 @@
+# Copyright (c) 2011 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.
+{
+  'msvs_settings': {
+    'VCCLCompilerTool': {
+      'StringPooling': 'true',
+    },
+    'VCLinkerTool': {
+      # No incremental linking.
+      'LinkIncremental': '1',
+      # Eliminate Unreferenced Data (/OPT:REF).
+      'OptimizeReferences': '2',
+      # Folding on (/OPT:ICF).
+      'EnableCOMDATFolding': '2',
+    },
+  },
+}