engine: work around GCC 12.1 issue with RELEASE=0 builds due to xxHash...

engine: work around GCC 12.1 issue with RELEASE=0 builds due to xxHash specifying forced inlining after inlining has been disabled via -O0/-Og

source/build/src/xxhash.c

@@ -40,4 +40,8 @@
 #define XXH_STATIC_LINKING_ONLY   /* access advanced declarations */
 #define XXH_IMPLEMENTATION   /* access definitions */
 
+#ifndef NDEBUG
+#define XXH_NO_INLINE_HINTS 1
+#endif
+
 #include "xxhash.h"