CLJS: syntax-quote doesn't auto-qualify symbols

If x resolves to cljs.user/x then read-string on "`x" should result in the cljs.user namespace being incorporated in the result.

For example, testing using the Node REPL that ships with ClojureScript:

cljs.user=> (require '[cljs.tools.reader :as r])
nil
cljs.user=> (binding [r/resolve-symbol (fn [_] 'cljs.user/x)]
  (r/read-string "`x"))
(quote x)

The result should instead be

(quote cljs.user/x)