rustc-ap-rustc_cratesio_shim 168.0.0

Automatically published version of the package `rustc_cratesio_shim` in the rust-lang/rust repository from commit ae46aefd5b682b4e4206b91df60760da8483b659 The publishing script for this crate lives at: https://github.com/alexcrichton/rustc-auto-publish