Update lang_info to Glottolog latest version

[bambooforest]

Problem is that Glottolog 4.2 no longer has the endangerment status field in their downloads. It does exist in the CLDF dump.

Robert Forkel kindly wrote a recipe to dump this information:

https://github.com/glottolog/cookbook/blob/master/recipes/glottolog_cldf/README.md

So we can take it from there.

@christianbentz - also emailed Harald.

Todo:

• decide if we should include status
• update the langInfo file and the code to generate it