Clear JIT cache on exit (#1518)

* Initial cache memory allocator implementation

* Get rid of CallFlag

* Perform cache cleanup on exit

* Basic cache invalidation

* Thats not how conditionals works in C# it seems

* Set PTC version to PR number

* Address PR feedback

* Update InstEmitFlowHelper.cs

* Flag clear on address is no longer needed

* Do not include exit block in function size calculation

* Dispose jump table

* For future use

* InternalVersion = 1519 (force retest).

Co-authored-by: LDj3SNuD <35856442+LDj3SNuD@users.noreply.github.com>

Ryujinx.Cpu/MemoryManager.cs

@@ -40,6 +40,8 @@ namespace Ryujinx.Cpu
 
         public MemoryTracking Tracking { get; }
 
+        internal event Action<ulong, ulong> UnmapEvent;
+
         /// <summary>
         /// Creates a new instance of the memory manager.
         /// </summary>
@@ -100,6 +102,14 @@ namespace Ryujinx.Cpu
         /// <param name="size">Size of the range to be unmapped</param>
         public void Unmap(ulong va, ulong size)
         {
+            // If size is 0, there's nothing to unmap, just exit early.
+            if (size == 0)
+            {
+                return;
+            }
+
+            UnmapEvent?.Invoke(va, size);
+
             ulong remainingSize = size;
             ulong oVa = va;
             while (remainingSize != 0)