Invalidate shaders when they are modified

Ryujinx.Graphics.Gpu/Shader/CachedShader.cs

@@ -0,0 +1,19 @@
+using Ryujinx.Graphics.GAL;
+using Ryujinx.Graphics.Shader;
+
+namespace Ryujinx.Graphics.Gpu.Shader
+{
+    class CachedShader
+    {
+        public ShaderProgram Program { get; }
+        public IShader       Shader  { get; set; }
+
+        public int[] Code { get; }
+
+        public CachedShader(ShaderProgram program, int[] code)
+        {
+            Program  = program;
+            Code     = code;
+        }
+    }
+}