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

musl: update struct_pthread to musl 1.2 layout
https://github.com/void-linux/void-packages/pull/52706

Description:
musl: update struct_pthread to musl 1.2 layout
our tid caching implementation in chromium was depending on internal
musl ABI from musl 1.2.4, but we stil have musl 1.1.x by default.

Adding patches to get the same struct_pthread layout from mus 1.2 to get
our chromium builds compatible with both musl 1.1 and 1.2