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

brotli: add backport patch to address issue google/brotli#836
https://github.com/void-linux/void-packages/pull/24950

Description:
`brotli` has a fairly bad regression, breaking builds that depend on `brotli` and `pkg-config` (for example `libsoup` as I mentioned in #24260).

There's already a fix on master, which is where this patch came from, so this patch can be discarded whenever `brotli` does their next release.