Auto merge of rust-lang#84665 - adamgemmell:aarch64-features, r=Amanieu

Update list of allowed aarch64 features

I recently added these features to std_detect for aarch64 linux, pending [review](rust-lang/stdarch#1146).

I have commented any features not supported by LLVM 9, the current minimum version for Rust. Some (PAuth at least) were renamed between 9 & 12 and I've left them disabled. TME, however, is not in LLVM 9 but I've left it enabled.

See rust-lang/stdarch#993

Author: bors

std/tests/run-time-detect.rs

@@ -27,7 +27,6 @@ fn aarch64_linux() {
     println!("asimd: {}", is_aarch64_feature_detected!("asimd"));
     println!("sve: {}", is_aarch64_feature_detected!("sve"));
     println!("crc: {}", is_aarch64_feature_detected!("crc"));
-    println!("crypto: {}", is_aarch64_feature_detected!("crypto"));
     println!("lse: {}", is_aarch64_feature_detected!("lse"));
     println!("rdm: {}", is_aarch64_feature_detected!("rdm"));
     println!("rcpc: {}", is_aarch64_feature_detected!("rcpc"));