xorg.utilmacros: 1.19.1 -> 1.19.2

Semi-automatic update generated by https://github.com/ryantm/nix-update tools. 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 1.19.2 with grep in /nix/store/0dsmsg3p8dzp24h3ldc8xl0kzjwxpg6b-util-macros-1.19.2
- directory tree listing: https://gist.github.com/c2988d9a6c1d7cd8bfd5b9513e60d79c