Auto merge of #4512 - mati865:rustup, r=phansch
Auto merge of #4512 - mati865:rustup, r=phansch

Rustup to rust-lang/rust#64111

changelog: none

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