GPU: Delay Fences.

src/video_core/gpu.cpp

@@ -145,6 +145,10 @@ void GPU::FlushCommands() {
 void GPU::SyncGuestHost() {
     renderer->Rasterizer().SyncGuestHost();
 }
+
+void GPU::OnCommandListEnd() {
+    maxwell_3d->ReleaseFences();
+}
 // Note that, traditionally, methods are treated as 4-byte addressable locations, and hence
 // their numbers are written down multiplied by 4 in Docs. Here we are not multiply by 4.
 // So the values you see in docs might be multiplied by 4.