qmake: move QT_BEGIN_NAMESPACE to correct place

this makes no difference whatsoever, because qmake isn't actually built
in a namespace, but it makes the new qtc code model happy.

Change-Id: I70ad8e16cceff73276a821219fc80bab365954b5
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>

qmake/generators/win32/registry_p.h

@@ -40,8 +40,6 @@
 // We mean it.
 //
 
-QT_BEGIN_NAMESPACE
-
 #include <QtCore/qglobal.h>
 
 #ifdef Q_OS_WIN32
@@ -52,6 +50,8 @@ QT_BEGIN_NAMESPACE
 
 #include <QtCore/qstring.h>
 
+QT_BEGIN_NAMESPACE
+
 /**
  * Read a value from the Windows registry.
  *

qmake/qmake_pch.h

@@ -54,10 +54,10 @@
 #include <stdlib.h>
 #include <qregexp.h>
 
-QT_BEGIN_NAMESPACE
 //#include <qdir.h>
 //#include "option.h"
 
+QT_BEGIN_NAMESPACE
 QT_END_NAMESPACE
 
 #endif