musl: HWCAP_* consts missing on aarch64 targets #2171
Description
It looks like #1638 added these constants, but for glibc only. #2109 added a TODO-linux.txt which made a note of this.
I just received an in-the-wild report about this (RustCrypto/hashes#273) and noticed there wasn't a specific tracking issue for it, so I thought I'd open one.
At first glance it seems like this could be resolved by a PR similar to #1638, but adding the constants to linux/musl/b64/aarch64/mod.rs.
Is that the case? If so, I could try to open a PR to add these constants. Edit: opened #2172.