New review comment by q66 on void-packages repository

https://github.com/void-linux/void-packages/pull/24190#discussion_r477108623

Comment:
It'd probably be reasonable to enable threads on aarch64 too, and leave NEON on, and enable threads on ppc32; do that by changing the `ppc64*` case to `ppc*|aarch64*`, then drop the standalone `aarch64*` case