rustc-ap-rustc_cratesio_shim 494.0.0

Automatically published version of the package `rustc_cratesio_shim` in the rust-lang/rust repository from commit 5e2c11034f9255f8b7bc7ded527d1db5175985f8 The publishing script for this crate lives at: https://github.com/alexcrichton/rustc-auto-publish