Fix:

error: unknown type name 'uint64_t'
--- scripts/rpcgen/tests/demo.h.orig	2024-12-02 06:16:51.000000000 -0600
+++ scripts/rpcgen/tests/demo.h	2024-12-12 22:57:17.000000000 -0600
@@ -1,3 +1,5 @@
+#include <stdint.h>
+
 enum TestEnum {
     TEST_ENUM_ONE = 1,
     TEST_ENUM_TWO = 2,
