There is an updated pull request by ericonr against master on the void-packages repository

https://github.com/ericonr/void-packages qg
https://github.com/void-linux/void-packages/pull/31995

wireguard-tools: include contrib/ contents in package.
Other distros are putting them in /usr/share/wireguard-tools/examples,
so we also do that for consistency.

@leahneukirchen 

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#### General
- [ ] This is a new package and it conforms to the [quality requirements](https://github.com/void-linux/void-packages/blob/master/Manual.md#quality-requirements)

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- [ ] I use the packages affected by the proposed changes on a regular basis and confirm this PR works for me
- [ ] I generally don't use the affected packages but briefly tested this PR

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A patch file from https://github.com/void-linux/void-packages/pull/31995.patch is attached