[clang-doc] Correct improper file paths in HTML output

In index.js the logic of the ternary operator was backwards, preventing
us from generating the correct file paths, or relative paths in the HTML
output.

Author: ilovepi

clang-tools-extra/clang-doc/assets/index.js

@@ -2,8 +2,8 @@ function genLink(Ref) {
   // we treat the file paths different depending on if we're
   // serving via a http server or viewing from a local
   var Path = window.location.protocol.startsWith("file") ?
-      `${window.location.protocol}//${window.location.host}/${Ref.Path}` :
-      `${window.location.protocol}//${RootPath}/${Ref.Path}`;
+      `${window.location.protocol}//${RootPath}/${Ref.Path}` :
+      `${window.location.protocol}//${window.location.host}/${Ref.Path}`;
   if (Ref.RefType === "namespace") {
     Path = `${Path}/index.html`
   } else if (Ref.Path === "") {