Print guest stack trace on invalid memory access (#1407)

* Print guest stack trace on invalid memory access

* Improve XML docs

Ryujinx.Memory/InvalidMemoryRegionException.cs

@@ -0,0 +1,19 @@
+using System;
+
+namespace Ryujinx.Memory
+{
+    public class InvalidMemoryRegionException : Exception
+    {
+        public InvalidMemoryRegionException() : base("Attempted to access a invalid memory region.")
+        {
+        }
+
+        public InvalidMemoryRegionException(string message) : base(message)
+        {
+        }
+
+        public InvalidMemoryRegionException(string message, Exception innerException) : base(message, innerException)
+        {
+        }
+    }
+}