New comment by q66 on void-packages repository

https://github.com/void-linux/void-packages/pull/18135#issuecomment-572621418

Comment:
i'd probably add explicit `threading=multi runtime-link=shared link=shared,static` to build options, just to be on the safe side (also i think `reading=multi` is actually not default and we've been building boost wrong all along)

also, do we really need 1.69 to be introduced...