OPENSSL_cpuid_setup SIGILL on ARM

[MagaTailor]

I'm pretty sure the crash I'm getting on ARM, like in this issue, see comment, is related to my old friend, this ARM breakage and the issues it caused in rust-openssl:

#314

I'm stumped however why it used to work fine in the past.
The crash is triggered by exa -l, but I'm confident the casts used to fix this crate are the best place to start an investigation.

openssl-sys v0.7.7

rustc 1.9.0-dev (1a019dc86 2016-03-11)
binary: rustc
commit-hash: 1a019dc86de1459809f776b869e36f8e71a7665a
commit-date: 2016-03-11
host: arm-unknown-linux-gnueabihf

[MagaTailor]

Turning optimizations off makes the crash go away - NEON instructions were the culprit specifically. So it must be related to autovectorization, which points to a bug in recent llvm as it definitely worked in the past.