update core projects

MediaBrowser.Model/System/Architecture.cs

@@ -4,6 +4,7 @@
     {
         X86 = 0,
         X64 = 1,
-        Arm = 2
+        Arm = 2,
+        Arm64 = 3
     }
 }

MediaBrowser.Model/System/IEnvironmentInfo.cs

@@ -11,6 +11,7 @@ namespace MediaBrowser.Model.System
         MediaBrowser.Model.System.OperatingSystem OperatingSystem { get; }
         string OperatingSystemName { get; }
         string OperatingSystemVersion { get; }
+        Architecture SystemArchitecture { get; }
     }
 
     public enum OperatingSystem