Update UInt128.cs (#453)

Fix invalid Write implementation.

Ryujinx.HLE/Utilities/UInt128.cs

@@ -44,8 +44,8 @@ namespace Ryujinx.HLE.Utilities
 
         public void Write(BinaryWriter BinaryWriter)
         {
-            BinaryWriter.Write(High);
             BinaryWriter.Write(Low);
+            BinaryWriter.Write(High);
         }
 
         public override string ToString()
@@ -58,4 +58,4 @@ namespace Ryujinx.HLE.Utilities
             return (Low | High) == 0;
         }
     }
-}
+}