Interpretation warnings print var symbol instead of the value

When using `set-warn-on-interpretation!`, the generated warnings look like

```
WARNING: interpreting by default at #'cljs.analyzer/*cljs-file*:125:1
attrs64469
Inferred tag was: #{any}
```

It might be better if instead of `#'cljs.analyzer/*cljs-file*` it would print the actual value ie. the name of the file. Thanks to theller for pointing this out.