CMake: Trigger reparse when target changed

Change-Id: I47959361a345e372265a19982c1b1e6ea778dd89
Task-number: QTCREATORBUG-15927
Reviewed-by: Tim Jenssen <tim.jenssen@theqtcompany.com>

src/plugins/cmakeprojectmanager/cmakebuildconfiguration.h

@@ -93,6 +93,7 @@ protected:
 
 private:
     void ctor();
+    void maybeForceReparse();
     QList<ConfigModel::DataItem> completeCMakeConfiguration() const;
     void setCurrentCMakeConfiguration(const QList<ConfigModel::DataItem> &items);