DAP: Fix python debug stoping

Change-Id: I49ac6d9d7164a7f74fe683840734d903643b3561
Reviewed-by: hjk <hjk@qt.io>

src/plugins/debugger/dap/pydapengine.h

@@ -14,6 +14,8 @@ public:
 
 private:
     void handleDapInitialize() override;
+    void quitDebugger() override;
+
     void setupEngine() override;
     Utils::Process m_proc;
 };