This changes the -onfinish setting from "stop" to "final" for Questa
and ModelSim. The "final" setting is required so that SystemVerilog
final blocks run. This also has the same effect as "stop" in that it
won't ask you in the GUI if you want to exit the simulator when
$finish() is called.
Original-commit: 7ab4e9a4e2c0408ca595ad168199a54bf416c894