Implement & link jaudio_NES/game64.c

Co-authored-by: roeming <roeming@users.noreply.github.com>

include/libc/stdio.h

@@ -3,6 +3,10 @@
 
 #include <stdarg.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 typedef struct
 {
     int unk0;
@@ -31,4 +35,8 @@ int sprintf(char *s, const char *format, ...);
 int vprintf(const char *format, va_list arg);
 int vsprintf(char *s, const char *format, va_list arg);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif