opengrok: 0.12.5 -> 1.0

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 1.0 with grep in /nix/store/x8i9mf6wvwj3n7il5kixfyrn0gdshnsb-opengrok-1.0
- found 1.0 in filename of file in /nix/store/x8i9mf6wvwj3n7il5kixfyrn0gdshnsb-opengrok-1.0