acpica-tools: 20180508 -> 20180531 (#41575)

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

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

These checks were done:

- built on NixOS
- /nix/store/x1sw7fxqaqayhy9hyvh57xc2zjg5d4yw-acpica-tools-20180531/bin/acpibin passed the binary check.
- /nix/store/x1sw7fxqaqayhy9hyvh57xc2zjg5d4yw-acpica-tools-20180531/bin/acpidump passed the binary check.
- /nix/store/x1sw7fxqaqayhy9hyvh57xc2zjg5d4yw-acpica-tools-20180531/bin/acpiexec passed the binary check.
- /nix/store/x1sw7fxqaqayhy9hyvh57xc2zjg5d4yw-acpica-tools-20180531/bin/acpihelp passed the binary check.
- /nix/store/x1sw7fxqaqayhy9hyvh57xc2zjg5d4yw-acpica-tools-20180531/bin/acpinames passed the binary check.
- /nix/store/x1sw7fxqaqayhy9hyvh57xc2zjg5d4yw-acpica-tools-20180531/bin/acpixtract passed the binary check.
- 6 of 6 passed binary check by having a zero exit code.
- 0 of 6 passed binary check by having the new version present in output.
- directory tree listing: https://gist.github.com/0bdfbe66fba66901dbdc08214997cf2d
- du listing: https://gist.github.com/28d13e951134d3565b807bef5d9610ec