D3D: Move device release from Renderer destructor to shutdown

Necessary if we wish to have GPU objects in our base class, as otherwise
the device will be released before the objects.

Source/Core/VideoBackends/D3D/main.cpp

@@ -181,6 +181,8 @@ void VideoBackend::Shutdown()
   g_texture_cache.reset();
   g_renderer.reset();
 
+  D3D::Close();
+
   ShutdownShared();
 }