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/frc971/wpilib/wpilib_interface.h b/frc971/wpilib/wpilib_interface.h
index 8ab92ef..b992aa3 100644
--- a/frc971/wpilib/wpilib_interface.h
+++ b/frc971/wpilib/wpilib_interface.h
@@ -1,7 +1,7 @@
 #ifndef FRC971_WPILIB_WPILIB_INTERFACE_H_
 #define FRC971_WPILIB_WPILIB_INTERFACE_H_
 
-#include <stdint.h>
+#include <cstdint>
 
 #include "aos/events/event_loop.h"
 #include "frc971/input/robot_state_generated.h"