openlibm: 0.5.4 -> 0.5.5

Semi-automatic update. These checks were done:

- built on NixOS
- Warning: no binary found that responded to help or version flags. (This warning appears even if the package isn't expected to have binaries.)
- found 0.5.5 with grep in /nix/store/im5hsldagl6la2yf5s8rsnv2w57mb76m-openlibm-0.5.5
- found 0.5.5 in filename of file in /nix/store/im5hsldagl6la2yf5s8rsnv2w57mb76m-openlibm-0.5.5