ClangStaticAnalyzer: Fix running state

If a run finished Application Output pane still handled the respective tab
as running.

Change-Id: I0bc7e1f61b68e700a875538bdd1c63c18bec8df3
Reviewed-by: hjk <hjk@theqtcompany.com>
Reviewed-by: Christian Kandeler <christian.kandeler@theqtcompany.com>

src/plugins/clangstaticanalyzer/clangstaticanalyzerruncontrol.cpp

@@ -513,6 +513,7 @@ void ClangStaticAnalyzerRunControl::finalize()
     }
 
     m_progress.reportFinished();
+    m_running = false;
     emit finished();
 }