dcraw: 9.26.0 -> 9.27.0

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

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

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 9.27.0 with grep in /nix/store/l6b0pk32npx23k5qpdi5n8zcfq9sahx4-dcraw-9.27.0
- directory tree listing: https://gist.github.com/4c120255f84b102eb8cf19d2ee4bd491