6863864: (fs) Path.createSymbolicLink doesn't set directory flag when creating sym link to directory (win)

[Xueming Shen]

looks good.

sherman

Alan Bateman wrote:
> Sherman - do you mind reviewing this one?
>
> It's a small over sight in the implementation of 
> Path#createSymbolicLink on Windows. Sym links to files and different 
> to sym links to directories so there is a check on the target type 
> that is incorrect for the case that the target is a relative path 
> without a root component (other cases are okay). There is also a 
> corner case when creating a sym link to a existing directory sym link 
> where the final target doesn't exist. I've fixed both of these issues 
> and improved the test coverage. The webrev is here:
>    http://cr.openjdk.java.net/~alanb/6863864/webrev.00/
>
> Thanks,
> Alan.