Fix cstdint include for GCC 15

--- tenacity.orig/libraries/lib-utility/MemoryX.cpp
+++ tenacity/libraries/lib-utility/MemoryX.cpp
@@ -10,6 +10,8 @@
 
 #include "MemoryX.h"
 
+#include <cstdint>
+
 // Make the symbol table non-empty
 UTILITY_API void lib_utility_dummy_symbol()
 {}