stats: more updates due to PCI changes

A couple of the long regressions have been showing as CHANGED
since 11244:a2af58a06c4e despite the updates in 11245:1c5102c0a7a9.
The x86 regression looks like it was just missed, but it's not clear
why the ARM one is giving different results (perhaps a non-determinism
between zizzer and wherever the updated results were run?).

stats: update stats for cache occupancy and clock domain changes

ruby: rename MESI_CMP_directory to MESI_Two_Level

This is because the next patch introduces a three level hierarchy.