Merge pull request #768 from StephenHodgson/HTK-BuildFixes

Build utilities update

Assets/HoloToolkit/Build/Editor/BuildSLNUtilities.cs

@@ -255,7 +255,7 @@ public static void ParseBuildCommandLine(ref BuildInfo buildInfo)
 
                     buildInfo.WSASdk = (WSASDK)Enum.Parse(typeof(WSASDK), wsaSdkArg);
                 }
-                else if (string.Equals(arguments[i], "-usaUwpSdk", StringComparison.InvariantCultureIgnoreCase))
+                else if (string.Equals(arguments[i], "-wsaUwpSdk", StringComparison.InvariantCultureIgnoreCase))
                 {
                     buildInfo.WSAUwpSdk = arguments[++i];
                 }