rustc-ap-rustc_cratesio_shim 507.0.0

Automatically published version of the package `rustc_cratesio_shim` in the rust-lang/rust repository from commit 85ed21e83c9f42203cfe06d41eab3f160bd13518 The publishing script for this crate lives at: https://github.com/alexcrichton/rustc-auto-publish