vfs_real: Forward declare IOFile

Eliminates the need to rebuild some source files if the file_util header
ever changes. This also uncovered some indirect inclusions, which have
also been fixed.

src/yuzu/game_list.h

@@ -20,6 +20,8 @@
 #include <QVBoxLayout>
 #include <QWidget>
 
+#include "common/common_types.h"
+
 class GameListWorker;
 class GMainWindow;