Use cstdint instead of inttypes.h

Summary: This is the only place `inttypes.h` is used in Folly and it's used in a context where `cstdint` would have sufficed.

Reviewed By: yfeldblum

Differential Revision: D4619248

fbshipit-source-id: e67dccb7d8bf1ad5f7539d4b039590253e8d8c79

folly/io/async/DelayedDestructionBase.h

@@ -18,13 +18,14 @@
 
 #include <assert.h>
 #include <cstddef>
+#include <cstdint>
+#include <functional>
 #include <memory>
 #include <type_traits>
 #include <utility>
+
 #include <boost/noncopyable.hpp>
-#include <functional>
 #include <glog/logging.h>
-#include <inttypes.h>
 
 namespace folly {