rustc-ap-rustc_cratesio_shim 356.0.0

Automatically published version of the package `rustc_cratesio_shim` in the rust-lang/rust repository from commit 491680114ac3dd1a4c7005ce0459025ee1276d40 The publishing script for this crate lives at: https://github.com/alexcrichton/rustc-auto-publish