Auto merge of #748 - fitzgen:rust-dev-tools-contributing-checklist, r=emilio
Auto merge of #748 - fitzgen:rust-dev-tools-contributing-checklist, r=emilio

Going through the rust dev tools contributing checklist

Filling in some obvious gaps from https://github.com/nrc/dev-tools-team/blob/master/contribution/checklist.md

r? @emilio

cc @rust-lang/dev-tools : would anyone like to review our CONTRIBUTING.md file in general? (and our contribution workflow?) (and probably outside of this PR)

rust-lang/rust-bindgen,emilio/rust-bindgen,emilio/rust-bindgen,emilio/rust-bindgen,rust-lang/rust-bindgen,emilio/rust-bindgen,rust-lang/rust-bindgen,rust-lang/rust-bindgen,emilio/rust-bindgen