Regression: Fix topologies path in failing pc-simple-timing-ruby
Regression: Fix topologies path in failing pc-simple-timing-ruby

This patch updates the path to the Ruby topologies and thus fixes a
failing regression.

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