Fix CurrentProject:QT_INSTALL_BINS.

This stopped working when renaming the Qt Creator variable.

Reviewed-by: Kai Koehne

src/plugins/qt4projectmanager/qt4projectmanager.cpp

@@ -191,7 +191,7 @@ void Qt4Manager::updateVariable(const QString &variable)
             return;
         }
         QString value = qt4pro->activeTarget()->activeBuildConfiguration()
-                ->qtVersion()->versionInfo().value(QLatin1String(kInstallBins));
+                ->qtVersion()->versionInfo().value(QLatin1String("QT_INSTALL_BINS"));
         Core::VariableManager::instance()->insert(QLatin1String(kInstallBins), value);
     }
 }