setbfree: 0.8.8 -> 0.8.9 (#69960)

* setbfree: 0.8.8 -> 0.8.9

Semi-automatic update generated by
https://github.com/ryantm/nixpkgs-update tools. This update was made
based on information from
https://repology.org/metapackage/setbfree/versions

* setbfree: restrict to x86 linux

Fails to build on ARM