Auto merge of #970 - mp4096:master, r=brson
Auto merge of #970 - mp4096:master, r=brson

Fixed link to the list of supported platforms

rust-lang/rustup,Boddlnagg/rustup.rs,polonez/rustup.rs,rust-lang/rustup,Boddlnagg/rustup.rs,polonez/rustup.rs,Boddlnagg/rustup.rs,polonez/rustup.rs,nodakai/rustup.rs,polonez/rustup.rs,theindigamer/rustup.rs,nodakai/rustup.rs,nodakai/rustup.rs,theindigamer/rustup.rs,theindigamer/rustup.rs,rust-lang/rustup,inejge/rustup.rs,nodakai/rustup.rs,theindigamer/rustup.rs,inejge/rustup.rs,inejge/rustup.rs,Boddlnagg/rustup.rs,polonez/rustup.rs,rust-lang/rustup,inejge/rustup.rs,Boddlnagg/rustup.rs,rust-lang/rustup,inejge/rustup.rs,theindigamer/rustup.rs,nodakai/rustup.rs