fixed build break.

src/EditorFeatures/TestUtilities/Remote/WatsonReporter.cs

@@ -17,6 +17,7 @@ public static void Report(string description, Exception exception, Func<IFaultUt
         public interface IFaultUtility
         {
             void AddProcessDump(int pid);
+            void AddFile(string fullpathname);
         }
     }
 }

src/VisualStudio/Core/Next/Remote/JsonRpcClient.cs

@@ -132,7 +132,7 @@ private void ReportExtraInfoAsNFW(Exception ex)
                                 continue;
                             }
 
-                            faultUtility.AddFile(file);
+                            u.AddFile(file);
                         }
                     }
                 }