Fix build

Author: davidwengier

src/Razor/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Settings/ClientSettingsManagerTest.cs

@@ -5,6 +5,7 @@
 using System.Collections.Generic;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Razor.Test.Common.VisualStudio;
+using Microsoft.CodeAnalysis.Razor.Logging;
 using Microsoft.CodeAnalysis.Razor.Settings;
 using Xunit;
 using Xunit.Abstractions;