Add changelog comment about binary codec
Add changelog comment about binary codec

dart-lang/sdk,dart-lang/sdk,dart-lang/dart2js_info,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-archive/dart2js_info,dart-lang/sdk,dart-lang/dart2js_info,dart-archive/dart2js_info