Bugfix for Razor Class Library assets

[gumbarros]

        services.AddWebOptimizer(options =>
        {
            options.AddCssBundle("/css/jjmasterdata.min.css", "_content/JJMasterData.Web/css/jjmasterdata.css","_content/JJMasterData.Web/css/flatpickr/airbnb.css");
        });

When I reference a RCL asset like this, I get the following error: After my fix, everything works:

[madskristensen]

Thanks