GameSettings: Add trait for sw-renderer-for-readbacks

src/frontend-common/game_list.h

@@ -133,7 +133,7 @@ private:
   enum : u32
   {
     GAME_LIST_CACHE_SIGNATURE = 0x45434C47,
-    GAME_LIST_CACHE_VERSION = 29
+    GAME_LIST_CACHE_VERSION = 30
   };
 
   using CacheMap = std::unordered_map<std::string, GameListEntry>;