Snippets for lbdb 0.57 from Nix x86_64-linux

Sourced from https://hydra.nixos.org/log/a5zff5778yb9w5rdvh6m2mqk4dhfmif5-lbdb-0.57.drv.

• dotlock.c:434:5: warning: ignoring return value of 'link' declared with attribute 'warn_unused_result' [-Wunused-result]
    434 |     link (nfslockfile, lockfile);
        |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~