Fix Compliance regression
This pull-request resolves two issues:
- openhwgroup/core-v-verif#308 (it implements option 1 mentioned in that issue)
- openhwgroup/core-v-verif#313
It also partially addresses openhwgroup/core-v-verif#302 (which was resolved by pull request #306).
Once this is merged in, the RISC-V Compliance test suite will be runnable from the command-line as per the instructions in the README and will also be complete in regression.