File openmsx-fix-build-with-gcc13.patch of Package openmsx

diff -Nur openmsx-18.0-orig/src/utils/hash_set.hh openmsx-18.0/src/utils/hash_set.hh
--- openmsx-18.0-orig/src/utils/hash_set.hh	2022-06-12 15:53:09.000000000 +0200
+++ openmsx-18.0/src/utils/hash_set.hh	2023-04-02 13:13:54.142050261 +0200
@@ -17,6 +17,7 @@
 #include <new>
 #include <type_traits>
 #include <utility>
+#include <cstdint>
 
 namespace hash_set_impl {