rustc-ap-rustc_cratesio_shim 320.0.0

Automatically published version of the package `rustc_cratesio_shim` in the rust-lang/rust repository from commit 6d34ec18c7d7e574553f6347ecf08e1e1c45c13d The publishing script for this crate lives at: https://github.com/alexcrichton/rustc-auto-publish