selinux: update to 3.8.1

[TraceyC77]

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Name

selinux

Version

3.8.1

Link to the release notes or announcement.

https://github.com/SELinuxProject/selinux/releases/tag/3.8.1

Reason for updating

Our SeLinux is at 3.7.1 which is almost a year old. 3.8.0 was released in January.