rustup-init: Update hash/version for 1.22.1

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 1.22.0 (37ebde2f1 2020-07-01)
+rustup-init 1.22.1 (76644d669 2020-07-08)
 The installer for rustup
 
 USAGE: