Expose name() of senders

Change-Id: Ia1e97cf5dc8f1e92728626b21fcf1b7f4da4e6b1
diff --git a/aos/events/event-loop.h b/aos/events/event-loop.h
index 0b336c3..a187981 100644
--- a/aos/events/event-loop.h
+++ b/aos/events/event-loop.h
@@ -73,6 +73,9 @@
   // Constructs an above message.
   Message MakeMessage();
 
+  // Returns the name of the underlying queue.
+  const char *name() const { return sender_->name(); }
+
  private:
   friend class EventLoop;
   Sender(std::unique_ptr<RawSender> sender) : sender_(std::move(sender)) {}