Finnish translation
Imported from https://gitlab.com/rilian-la-te/musl-locales/-/issues/13.
Author: Klaus Kuusela (@klaus.kuusela).
Here's is finnish translation (patch from current master 2021-03-10).
There is one problem with May. In finnish language, May is shortly "touko" and as long format "toukokuu". I decided to use short format anyhow.