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

https://github.com/dkwo/void-packages isl
https://github.com/void-linux/void-packages/pull/40173

isl: update to 0.25
#### Testing the changes
- I tested the changes in this PR: **briefly**

#### Local build testing
- I built this PR locally for my native architecture, x86_64-musl aarch64

A patch file from https://github.com/void-linux/void-packages/pull/40173.patch is attached