Python: check for pyside tools after installation

Change-Id: Icf9ae0ec08a78efc51216daa3304e76f8e812d5f
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/python/pythonrunconfiguration.h

@@ -43,6 +43,7 @@ public:
     QList<PySideUicExtraCompiler *> extraCompilers() const;
 
 private:
+    void checkForPySide(const Utils::FilePath &python);
     void updateExtraCompilers();
     Utils::FilePath m_pySideUicPath;