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/y2018/actors/autonomous_actor.cc b/y2018/actors/autonomous_actor.cc
index 89082df..cee84d8 100644
--- a/y2018/actors/autonomous_actor.cc
+++ b/y2018/actors/autonomous_actor.cc
@@ -1,13 +1,11 @@
 #include "y2018/actors/autonomous_actor.h"
 
-#include <inttypes.h>
-
 #include <chrono>
+#include <cinttypes>
 #include <cmath>
 
 #include "aos/logging/logging.h"
 #include "aos/util/phased_loop.h"
-
 #include "y2018/control_loops/drivetrain/drivetrain_base.h"
 
 namespace y2018 {