Don't randomly include "stdafx.h"

It's file for precompiled headers.
Include what is used, don't rely on transitive includes.

rpcs3/rpcs3qt/settings.cpp

@@ -2,6 +2,8 @@
 
 #include "qt_utils.h"
 
+#include "Utilities/File.h"
+
 inline std::string sstr(const QString& _in) { return _in.toStdString(); }
 
 settings::settings(QObject* parent) : QObject(parent),