t-unit/sar.t: Add eye falsification selfatari testcase
Moggy eyefillrate: Revert from 40 back to 60

With less than 50%, Pachi starts to massively misplay the concerned
corner situations.  I think measurements are way too noisy for
eyefillrate since the feature is very rarely applied.  Perhaps we
could get away fine with just pitching this at 100.