Make sensible use of global analyzer settings

Project settings now have the option to use the global settings (on by
default), or custom ones.

Task-number: QTCREATORBUG-5445

Change-Id: I6602b53a6e7823150773e8461ef9db39b7546e98
Reviewed-on: http://codereview.qt.nokia.com/2163
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: hjk <qthjk@ovi.com>

src/plugins/valgrind/valgrindsettings.cpp

@@ -131,6 +131,7 @@ bool ValgrindBaseSettings::fromMap(const QVariantMap &map)
     setIfPresent(map, QLatin1String(callgrindVisualisationMinimumCostRatioC),
                  &m_visualisationMinimumInclusiveCostRatio);
 
+    emit changed();
     return true;
 }