Debugger: automatically add source path mapping for Qt packages

Change-Id: I1199629729e3996adb574089c5db69f1fcf0ccd0
Reviewed-by: hjk <hjk@qt.io>

src/plugins/debugger/debuggercore.h

@@ -121,5 +121,8 @@ QAction *addAction(QMenu *menu, const QString &d1, const QString &d2, bool on,
 QAction *addCheckableAction(QMenu *menu, const QString &display, bool on, bool checked,
                             const std::function<void()> &onTriggered);
 
+// Qt's various build paths for unpatched versions
+QStringList qtBuildPaths();
+
 } // namespace Internal
 } // namespace Debugger