Auto merge of #6094 - ebroto:rustup, r=ebroto
Auto merge of #6094 - ebroto:rustup, r=ebroto

Rustup

changelog: none

r? `@ghost`

graydon/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust,graydon/rust,aidancully/rust,graydon/rust,aidancully/rust