rustc-ap-rustc_target 491.0.0

Automatically published version of the package `rustc_target` in the rust-lang/rust repository from commit 6312b89fdabce0aedf613391266e08c0deef2324 The publishing script for this crate lives at: https://github.com/alexcrichton/rustc-auto-publish

librustc_target contains some very low-level details that are specific to different compilation targets and so forth.

For more information about how rustc works, see the rustc guide.