Bulgarian Cyrillic locl

[svenper]

First of all, thanks for a really nice type family with amazing glyph coverage!

Which is why I think this small addition makes a lot of sense. Any chance Bulgarian Cyrillic variant characters might be added? Many of them have very similar Latin or Greek counterparts, e.g. г(s) д(g) и(u) к(k) п(n) т(m) Л(Λ) etc. so it should be mostly mechanical.

(See What shall be done for Bulgarian Cyrillic .loclBGR.)