openlibm: 0.5.5 -> 0.6.0

Semi-automatic update generated by https://github.com/ryantm/nixpkgs-update tools.

This update was made based on information from https://repology.org/metapackage/openlibm/versions.

These checks were done:

- built on NixOS

- 0 of 0 passed binary check by having a zero exit code.
- 0 of 0 passed binary check by having the new version present in output.
- found 0.6.0 with grep in /nix/store/crnh2jiksr0b3sq5v6fc9x7zrrsjgirg-openlibm-0.6.0
- directory tree listing: https://gist.github.com/c287196625881e2d6c72af761704718e
- du listing: https://gist.github.com/ac9a45900fb2ba4ff48120c343677dec