Change underscores in command-line arguments into dashes to be more compatible with Yang's options.
Change underscores in command-line arguments into dashes to be
more compatible with Yang's options.

jacekburys/csmith,DmitryOlshansky/dsmith,natgla/csmith,Panos90/csmith,Panos90/csmith,Panos90/csmith,natgla/csmith,jacekburys/csmith,DmitryOlshansky/dsmith,jacekburys/csmith,jacekburys/csmith,DmitryOlshansky/dsmith,Panos90/csmith,natgla/csmith,natgla/csmith,DmitryOlshansky/dsmith,jacekburys/csmith