Fix for Freightliner Classic XL truck v1.37

Fix adapts the Freightliner Classic XL truck to run on version 1.37.x

Updated engine audio registration (FMOD):
— Caterpillar: sound from Kenworth W900 SCS
— Detroit Diesel: the sound from the Kenworth T680 SCS
Minor changes to the onboard computer
Glass animation doesn't work, just sound

Freightliner Classic XL