message: rename xargo -> xargo_check
diff: @@ -100,7 +100,7 @@ fn cargo() -> Command {
  }
  }
  -fn xargo() -> Command {
  +fn xargo_check() -> Command {
  if let Ok(val) = std::env::var("XARGO_CHECK") {
  // Bootstrap tells us where to find xargo
  Command::new(val)
  @@ -202,7 +202,7 @@ fn test_sysroot_consistency() {
  }
  fn xargo_version() -> Option<(u32, u32, u32)> {
  - let out = xargo().arg("--version").output().ok()?;
  + let out = xargo_check().arg("--version").output().ok()?;
  if !out.status.success() {
  return None;
  }
  @@ -376,7 +376,7 @@ path = "lib.rs"
  // Prepare xargo invocation.
  let target = get_arg_flag_value("--target");
  let print_sysroot = !ask_user && has_arg_flag("--print-sysroot"); // whether we just print the sysroot path
  - let mut command = xargo();
  + let mut command = xargo_check();
  command.arg("build").arg("-q");
  command.current_dir(&dir);
  command.env("RUSTFLAGS", miri::miri_default_args().join(" "));
  