Compile fix for Windows Phone

Shlobj.h should not be included on Windows Phone. As it isn't needed
for WinRT in general here, exclude it.

Change-Id: I1eaa50ab8825d2f43d59272c841673c3e9e1e12a
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>

src/corelib/io/qsettings.cpp

@@ -78,7 +78,9 @@
 #ifdef Q_OS_WIN // for homedirpath reading from registry
 #  include <private/qsystemlibrary_p.h>
 #  include <qt_windows.h>
-#  include <shlobj.h>
+#  ifndef Q_OS_WINRT
+#    include <shlobj.h>
+#  endif
 #endif
 
 #ifdef Q_OS_WINRT