Crash fix on Linux

If you experience a crash on Linux in 0.7.18 release when loading world, with the log saying VK_ERROR_DEVICE_LOST , try the following:

Go in your config directory, check if there is a file called Engine.ini

and then add this two lines. If the file is not there create it yourself. Be sure to have uppercase 'E' in Engine.ini filename:

[SystemSettings] r.AllowStaticLighting=0

This will disable static lighting completely which seems to be the cause of crashes on some hardware.