rustc-ap-rustc_cratesio_shim 400.0.0

Automatically published version of the package `rustc_cratesio_shim` in the rust-lang/rust repository from commit 88f755f8a84df1d9e6b17cf10c96ae8b93481b2e The publishing script for this crate lives at: https://github.com/alexcrichton/rustc-auto-publish