New comment by sgn on void-packages repository

https://github.com/void-linux/void-packages/issues/25604#issuecomment-708753795

Comment:
>     2. If you _do_ use `bootstrap`, try `XBPS_PKG_OPTIONS="~ada"` instead of the gcc-specific variant. I remember some reports about the per-package option variables not working as expected.

`~ada` still puts some ada related files into gcc installation, which normally split into `gcc-ada`.
I think we would need to either:
- still split `gcc-ada` on `~ada`; or
- remove `gcc-ada` from `base-chroot`