bpo-32266: make test_pathlib pass when working path has junctions

[native-api]

Confirmed failures in 3.4 and 3.5, too.

In 3.4, will still fail in XP 'cuz _getfinalpathname is an alias to normpath there. There's no other API to resort to that can expand junctions save for checking every path part by hand.

https://bugs.python.org/issue32266

[iritkatriel]

@native-api Why did you close the PR? Did you intend to close https://bugs.python.org/issue32266 as well?

[native-api]

I closed the PR because it was rejected as per https://bugs.python.org/issue32266#msg310412, I no longer have the machine with the setup that exposed the problem and the fix wasn't particularly elegant -- need something stock to work as realpath.

I don't know if the problem is still there so don't know if the ticket can be closed.

[iritkatriel]

Thanks. The comment says it was too late to merge the patch in 3.4 and 3.5, I'm not sure it was rejected altogether.

But if we can't test for this now it may be the case that we close the ticket and deal with the problem if and when someone else comes across it.