Replace use of deprecated C Standard library headers in C++ code.

Change-Id: I9fa6630c7e4bdb2897df34d417635d8c7d8253bc
Signed-off-by: Tyler Chatow <tchatow@gmail.com>
diff --git a/y2017/actors/autonomous_actor.cc b/y2017/actors/autonomous_actor.cc
index 1124780..b683f51 100644
--- a/y2017/actors/autonomous_actor.cc
+++ b/y2017/actors/autonomous_actor.cc
@@ -1,8 +1,7 @@
 #include "y2017/actors/autonomous_actor.h"
 
-#include <inttypes.h>
-
 #include <chrono>
+#include <cinttypes>
 #include <cmath>
 
 #include "aos/logging/logging.h"