Invalidate shaders when they are modified

Ryujinx.Graphics.Gpu/Shader/ComputeShader.cs

@@ -0,0 +1,17 @@
+using Ryujinx.Graphics.GAL;
+
+namespace Ryujinx.Graphics.Gpu.Shader
+{
+    class ComputeShader
+    {
+        public IProgram HostProgram { get; set; }
+
+        public CachedShader Shader { get; }
+
+        public ComputeShader(IProgram hostProgram, CachedShader shader)
+        {
+            HostProgram = hostProgram;
+            Shader      = shader;
+        }
+    }
+}