There's a merged pull request on the void-packages repository

New package: llvm18
https://github.com/void-linux/void-packages/pull/48661

Description:
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#### Testing the changes
- I tested the changes in this PR: **briefly**


#### New package
- This new package conforms to the [package requirements](https://github.com/void-linux/void-packages/blob/master/CONTRIBUTING.md#package-requirements): **YES**


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#### Local build testing
- I built this PR locally for my native architecture, x86_64-musl
- I built this PR locally for these architectures (if supported. mark crossbuilds):
  - x86_64-musl
  - i686
  - aarch64 (cross)
  - aarch64-musl (native + cross)
  - armv7l (cross)
  - armv7l-musl (cross)
  - armv6l (cross)
  - armv6l-musl (cross)

[ci skip]