cfg/qt.cfg - Change the Q_D definition to avoid false positives

Change the O_D macro definition by moving the 'const' qualifier
to the front of the statement.

Without this change we get false positives "style: Variable 'd' can be
declared as pointer to const [constVariablePointer]"

The current definition follows Qt correctly as we see this
define in the `QtCore/qtclasshelpermacros.h` file:
Q_D(Class) Class##Private * const d = d_func()

but apparently cppcheck doesn't properly recognize that
as a const variable pointer.

Author: winterz

cfg/qt.cfg

@@ -5315,7 +5315,7 @@
   <!-- Treat QStringList as QList<QString> since we can't remove the template parameter when we inherit. -->
   <define name="QStringList" value="QList&lt;QString&gt;"/>
   <define name="Q_ARG(type, data)" value="QArgument&lt;type &gt;(#type, data)"/>
-  <define name="Q_D(Class)" value="Class##Private * const d = d_func()"/>
+  <define name="Q_D(Class)" value="const Class##Private *d = d_func()"/>
   <define name="Q_CLASSINFO(Name, Value)" value=""/>
   <define name="Q_EXPORT_PLUGIN(ClassName)" value=""/>
   <define name="Q_EXPORT_PLUGIN2(a,ClassName)" value=""/>