rustup-init.sh: Update for release 1.22.0

Signed-off-by: Daniel Silverstone <[email protected]>

Author: kinnison

rustup-init.sh

@@ -16,7 +16,7 @@ RUSTUP_UPDATE_ROOT="${RUSTUP_UPDATE_ROOT:-https://static.rust-lang.org/rustup}"
 #XXX: If you change anything here, please make the same changes in setup_mode.rs
 usage() {
     cat 1>&2 <<EOF
-rustup-init 1.21.0 (fd87b86c6 2019-12-19)
+rustup-init 1.22.0 (37ebde2f1 2020-07-01)
 The installer for rustup
 
 USAGE: