ProjectExplorer: Allow text filtering in compile output pane

Change-Id: Ibd5c20e5d5dbbb1867aefc8d701218469b3a427b
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/projectexplorer/compileoutputwindow.h

@@ -88,6 +88,8 @@ public:
     void setSettings(const CompileOutputSettings &settings);
 
 private:
+    void updateFilter() override;
+
     void loadSettings();
     void storeSettings() const;
     void updateFromSettings();