libcec_platform: 2.0.1 -> 2.1.0.1

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 2.1.0.1 with grep in /nix/store/klb1bvsf1az785f2jzvsg5g0sxs8g4l3-p8-platform-2.1.0.1
- directory tree listing: https://gist.github.com/be00d099a69bdff53bd6e138cf5d6877