change cljs.analyzer/cache-file to return cljs/aot/core.cljs.cache.edn resource

if available

Author: dnolen

src/clj/cljs/analyzer.clj

@@ -1888,8 +1888,13 @@ argument, which the reader will use in any emitted errors."
 (defn cache-file
   ([src] (cache-file src "out"))
   ([src output-dir]
-    (let [ns-info (parse-ns src)]
-      (io/file (str (util/to-target-file output-dir ns-info "cljs") ".cache.edn")))))
+   (if-let [core-cache
+            (and (util/url? src)
+                 (.endsWith (.getPath ^URL src) (str "cljs" File/separator "core.cljs"))
+                 (io/resource "cljs/aot/core.cljs.cache.edn"))]
+     core-cache
+     (let [ns-info (parse-ns src)]
+       (io/file (str (util/to-target-file output-dir ns-info "cljs") ".cache.edn"))))))
 
 (defn last-modified [src]
   (cond