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/aos/logging/interface.h b/aos/logging/interface.h
index 387e55d..f6fa249 100644
--- a/aos/logging/interface.h
+++ b/aos/logging/interface.h
@@ -1,8 +1,7 @@
 #ifndef AOS_LOGGING_INTERFACE_H_
 #define AOS_LOGGING_INTERFACE_H_
 
-#include <stdarg.h>
-
+#include <cstdarg>
 #include <functional>
 #include <string>