CLJS-1579: cljs.source-map/invert-reverse-map discards gcol

The innermost update-in should refer
to [gcol] in order to invert that bit
of the mapping.

Author: mfikes

src/main/cljs/cljs/source_map.cljs

@@ -292,7 +292,7 @@
         (doseq [{:keys [gline gcol name]} column-info]
           (swap! inverted update-in [gline]
             (fnil (fn [columns]
-                    (update-in columns [column] (fnil conj [])
+                    (update-in columns [gcol] (fnil conj [])
                       {:line line :col column :name name}))
               (sorted-map))))))
     @inverted))