Make simulated_event_loop run with --die_on_malloc

We can't yet turn it on globally since some mallocs have snuck back in.
Gotta beat them back out first.

Change-Id: Ib0fc90746002240b5afca6b36eff2f4b29bbfbb0
Signed-off-by: Austin Schuh <austin.linux@gmail.com>
diff --git a/aos/events/ping_lib.h b/aos/events/ping_lib.h
index 75d06e7..0b83d52 100644
--- a/aos/events/ping_lib.h
+++ b/aos/events/ping_lib.h
@@ -32,7 +32,7 @@
   // Last pong value received so we can detect missed pongs.
   int last_pong_value_ = 0;
 
-  bool quiet_ = false;
+  bool quiet_ = true;
 };
 
 }  // namespace aos