Scania R & Streamline V8 stock sound v5.0 1.41

Changelog version 5.0:

-euro6 variants sound completely rebuilded

-dynamic gearbox sound system included ("inspired" by zeemod)

-quieter interior sound

-lot more small improvement

Changelog version 4.5:

-fixed sound don't works in fred scania

-sound position included

-make gearbox whine come faster