Update probe.pm

Using the newer 'make_path' and 'remove_tree' causes build/configure to bail out on older versions of File::Path (especially those shipped with perl v5.10). Please see [File::Path#APIChanges][1]

[1]: https://metacpan.org/pod/File::Path#API-CHANGES
Merge pull request #79 from svatsan/patch-1

Update probe.pm