Proposal: Add YAML file with VM patch file information.

tools/yaml2json.dart

+// Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import 'dart:io' show File, exit, stderr;
+
+import 'dart:isolate' show RawReceivePort;
+
+import 'dart:convert' show JsonEncoder;
+
+import 'package:yaml/yaml.dart' show loadYaml;
+
+main(List<String> arguments) async {
+  var port = new RawReceivePort();
+  if (arguments.length != 2) {
+    stderr.writeln("Usage: yaml2json.dart input.yaml output.json");
+    exit(1);
+  }
+  Uri input = Uri.base.resolve(arguments[0]);
+  Uri output = Uri.base.resolve(arguments[1]);
+  var yaml = loadYaml(await new File.fromUri(input).readAsString());
+  await new File.fromUri(output).writeAsString(
+      const JsonEncoder.withIndent("  ").convert(yaml));
+  port.close();
+}