WINTERMUTE: Add workaround flags and use a workaround flag to fix #6647

Behaviour of BaseSprite::reset() changed in WME 1.8.6.
5MA and possibly other games ship with pre-1.8.6 WME, and depend on the old behaviour.

We then set up WME-specific workaround flags and use one of them to mark a game as depending on the old behaviour.

I had a lot of guidance from @fuzzie on this - but don't blame the poor lady if it's still ugly, the ugly parts are all mine.

If you prefer a less invasive (but imho rather ugly) solution there's my branch fix_cat_hackish: 
https://github.com/tobiatesan/scummvm/compare/fix_cat_hackish

It simply if()s to look at the game name.


Good, but this should be above the actual flag, as it will otherwise be very confusing whenever the next one is added.