llvm.aarch64.crc32b is not yet supported

[carlos-verdes]

I'm using Apple M1 Pro chip and trying to compile a project using cranelift I got the title error:

 thread 'main' (13059807) panicked at library/core/src/panicking.rs:228:5:
 llvm.aarch64.crc32b is not yet supported.
 See https://github.com/rust-lang/rustc_codegen_cranelift/issues/171
 Please open an issue at https://github.com/rust-lang/rustc_codegen_cranelift/issues
 note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
 thread caused non-unwinding panic. aborting.

[carlos-verdes]

I think this is related with #171