RFR (S) 8232168: Fix non wide char canonicalization on Windows

[Alan Bateman]

On 24/10/2019 16:25, Langer, Christoph wrote:
> Thanks, Calvin for the review.
>
> Alan, unless you have severe objections I'd push this tomorrow after running another night of tests with this patch and run doing jdk-submit. Is that ok with you?
>
I would like to review this change. Would you mind holding off for a few 
days until I can find time?

-Alan