message: send --static-root-path and --disable-per-crate-search to rustdoc
diff: @@ -75,7 +75,9 @@ pub fn build_doc(name: &str, vers: Option<&str>, target: Option<&str>) -> Result
  let mut rustdoc_args: Vec<String> =
  vec!["-Z".to_string(), "unstable-options".to_string(),
  "--resource-suffix".to_string(),
  - format!("-{}", parse_rustc_version(get_current_versions()?.0)?)];
  + format!("-{}", parse_rustc_version(get_current_versions()?.0)?),
  + "--static-root-path".to_string(), "/".to_string(),
  + "--disable-per-crate-search".to_string()];
  // since https://github.com/rust-lang/rust/pull/51384, we can pass --extern-html-root-url to
  // force rustdoc to link to other docs.rs docs for dependencies
  