Assume files w/o obvious OS are Linux (with warning) instead of giving a fatal error.
Assume files w/o obvious OS are Linux (with warning)
instead of giving a fatal error.

andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin