update startup wizard

MediaBrowser.Model/System/Architecture.cs

@@ -0,0 +1,9 @@
+namespace MediaBrowser.Model.System
+{
+    public enum Architecture
+    {
+        X86 = 0,
+        X64 = 1,
+        Arm = 2
+    }
+}

MediaBrowser.Model/System/SystemInfo.cs

@@ -154,6 +154,8 @@ namespace MediaBrowser.Model.System
 
         public bool HasExternalEncoder { get; set; }
 
+        public Architecture SystemArchitecture { get; set; }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="SystemInfo" /> class.
         /// </summary>