Update archive_entry_link_resolver to copy the "wide" pathname for hardlinks on Windo...

Update archive_entry_link_resolver to copy the "wide" pathname for hardlinks on Windows (#2225)

On Windows, if you are using `archive_entry_link_resolver` and give it
an entry that links to past entry whose pathname was set using a "wide"
string that cannot be represented by the current locale (i.e. WCS -> MBS
conversion fails), this code will crash due to a null pointer read. This
updates to use the `_w` function instead on Windows.

Note: this is a partial cherry-pick from
https://github.com/libarchive/libarchive/pull/2095, which I'm going to
go through and break into smaller pieces in hopes of getting some things
in while discussion of other things can continue.