message: add new essential files from new nightly
diff: @@ -386,15 +386,17 @@ impl DocBuilder {
  "storage.js",
  "theme.js",
  "source-script.js",
  - "noscript.css"],
  + "noscript.css",
  + "rust-logo.png"],
  + // favicon.ico is not needed because we set our own
  // files doesn't require rustc version subfix
  ["FiraSans-Medium.woff",
  "FiraSans-Regular.woff",
  - "Heuristica-Italic.woff",
  "SourceCodePro-Regular.woff",
  "SourceCodePro-Semibold.woff",
  - "SourceSerifPro-Bold.woff",
  - "SourceSerifPro-Regular.woff"]);
  + "SourceSerifPro-Bold.ttf.woff",
  + "SourceSerifPro-Regular.ttf.woff",
  + "SourceSerifPro-It.ttf.woff"]);
  let source = PathBuf::from(&self.options.chroot_path)
  .join("home")
  