Build lighting from command line

[anonymous_user_f1d3559f]

Light can be rebuild from console by command like:

UE4Editor.exe "C:\Work\Game\Game.uproject" Empty -AutomatedMapBuild CLDesc="Rebuilding Empty map" UseSCC=true

Also see:

• UDK | AutomatedMapBuild
• https://github.com/EpicGames/UnrealEngine/pull/1188