rustc-ap-serialize 341.0.0

Automatically published version of the package `serialize` in the rust-lang/rust repository from commit 0c91f3d97fe78d31c8cf3abb1858c65d73c6aa17 The publishing script for this crate lives at: https://github.com/alexcrichton/rustc-auto-publish

Support code for encoding and decoding types.