message: Make rustc_info a hidden file
diff: @@ -260,7 +260,7 @@ pub fn compile_ws<'a>(
  bail!("jobs must be at least 1")
  }
  - let rustc_info_cache = ws.target_dir().join("rustc_info.json").into_path_unlocked();
  + let rustc_info_cache = ws.target_dir().join(".rustc_info.json").into_path_unlocked();
  let mut build_config = BuildConfig::new(config, jobs, &target, Some(rustc_info_cache))?;
  build_config.release = release;
  build_config.test = mode == CompileMode::Test || mode == CompileMode::Bench;
  