rustc-ap-serialize 453.0.0

Automatically published version of the package `serialize` in the rust-lang/rust repository from commit 5f0dc0e1ffb10ff9277aacae9bff3e70d342c1d4 The publishing script for this crate lives at: https://github.com/alexcrichton/rustc-auto-publish

Support code for encoding and decoding types.