Make sure to dispose the page table and ThreadContext

Less memory leaks!

ARMeilleure/Instructions/NativeInterface.cs

@@ -24,6 +24,11 @@ namespace ARMeilleure.Instructions
 
                 ExclusiveAddress = ulong.MaxValue;
             }
+
+            public void Dispose()
+            {
+                Context.Dispose();
+            }
         }
 
         [ThreadStatic]
@@ -36,6 +41,8 @@ namespace ARMeilleure.Instructions
 
         public static void UnregisterThread()
         {
+            _context.Dispose();
+
             _context = null;
         }
 

Ryujinx.HLE/HOS/Kernel/Process/KProcess.cs

@@ -1131,5 +1131,10 @@ namespace Ryujinx.HLE.HOS.Kernel.Process
         {
             throw new UndefinedInstructionException(e.Address, e.OpCode);
         }
+
+        protected override void Destroy()
+        {
+            CpuMemory.Dispose();
+        }
     }
 }