message: Add missing break statement.
  Summary: Without this we will end up with two handshake done frames on loss.
diff: @@ -127,6 +127,7 @@ void updateSimpleFrameOnPacketLoss(
  case QuicSimpleFrame::Type::HandshakeDoneFrame: {
  const auto& handshakeDoneFrame = *frame.asHandshakeDoneFrame();
  conn.pendingEvents.frames.push_back(handshakeDoneFrame);
  + break;
  }
  case QuicSimpleFrame::Type::NewConnectionIdFrame:
  case QuicSimpleFrame::Type::MaxStreamsFrame:
  