rustc-ap-serialize 565.0.0

Automatically published version of the package `serialize` in the rust-lang/rust repository from commit bea0372a1a7a31b81f28cc4d9a83a2dc9a79d008 The publishing script for this crate lives at: https://github.com/alexcrichton/rustc-auto-publish

Support code for encoding and decoding types.