rustc-ap-rustc_cratesio_shim 312.0.0

Automatically published version of the package `rustc_cratesio_shim` in the rust-lang/rust repository from commit ced7cc5c6523ff478599ed9188df37e91fd96c68 The publishing script for this crate lives at: https://github.com/alexcrichton/rustc-auto-publish