[MinGW] RFA: Make Stack Traces Work for Interpreted Code on Windows

[Bryce McKinlay]

Ranjit Mathew wrote:
>  /* Store return addresses of the current program stack in
>     STATE and return the exact number of values stored.  */
>  void
> -fallback_backtrace (_Jv_UnwindState *state)
> +fallback_backtrace (_Unwind_Trace_Fn trace_fn, _Jv_UnwindState *state)
>  {
>   


The comment here should also be updated.

Bryce