DAP: Fix debugger stopping when python script is finished

Change-Id: If5fda34c4b570ba49067260252323e031007a3b3
Reviewed-by: hjk <hjk@qt.io>

src/plugins/debugger/dap/pydapengine.cpp

@@ -68,6 +68,7 @@ public:
                 &QTcpSocket::errorOccurred,
                 this,
                 &IDataProvider::readyReadStandardError);
+        connect(&m_proc, &Process::done, this, &TcpSocketDataProvider::kill);
     }
 
     ~TcpSocketDataProvider() { m_socket.disconnect(); }