Add set_name to event_loop.

Change-Id: I2ab1486eb8a348ceeec00ab170e2474d7fe25167
diff --git a/aos/events/raw-event-loop.h b/aos/events/raw-event-loop.h
index 6ff7179..7ab2810 100644
--- a/aos/events/raw-event-loop.h
+++ b/aos/events/raw-event-loop.h
@@ -138,6 +138,9 @@
   // Use this to run code once the thread goes into "real-time-mode",
   virtual void OnRun(::std::function<void()> on_run) = 0;
 
+  // Sets the name of the event loop.
+  virtual void set_name(const char *name) = 0;
+
   // Threadsafe.
   bool is_running() const { return is_running_.load(); }