Remove "const" usage that causes compile failure building qt4-tools-nativesdk

Upstream-Status: Denied [possible retry]

Patch has apparently been rejected upstream, not because it is invalid
but because the submitter did not submit a merge request for it, so the
validity of the patch upstream is uncertain. For further details see:
http://bugreports.qt.nokia.com/browse/QTBUG-17962

Original Author: Pavel Heimlich <tropikhajma at gmail.com>

--- qt-everywhere-opensource-src-4.7.3/src/dbus/qdbusintegrator.cpp.orig	2011-03-12 02:11:32.313467991 +0100
+++ qt-everywhere-opensource-src-4.7.3/src/dbus/qdbusintegrator.cpp	2011-03-12 02:11:03.795809176 +0100
@@ -71,7 +71,7 @@
 static bool isDebugging;
 #define qDBusDebug              if (!::isDebugging); else qDebug
 
-Q_GLOBAL_STATIC_WITH_ARGS(const QString, orgFreedesktopDBusString, (QLatin1String(DBUS_SERVICE_DBUS)))
+Q_GLOBAL_STATIC_WITH_ARGS(QString, orgFreedesktopDBusString, (QLatin1String(DBUS_SERVICE_DBUS)))
 
 static inline QString dbusServiceString()
 { return *orgFreedesktopDBusString(); }