New review comment by non-Jedi on void-packages repository

https://github.com/void-linux/void-packages/pull/24097#discussion_r476712410

Comment:
Looking at [how Fedora builds openblas with ILP64 (`libopenblas64_.so`)](https://src.fedoraproject.org/rpms/openblas/blob/5641975e5cba160e947c65c918c30f44b7bc17a5/f/openblas.spec#_411), getting it working on Void might not be so bad. Can take a look when I get a chance. I'd prefer not to block packaging julia 1.5 on this though.