rustc-ap-serialize 567.0.0

Automatically published version of the package `serialize` in the rust-lang/rust repository from commit a71e32e4078f3a8c1ebc2a731e23ac3da3ef73a1 The publishing script for this crate lives at: https://github.com/alexcrichton/rustc-auto-publish

Support code for encoding and decoding types.