Revert change to uutils version due to mv xattr bug

This reverts the change from MR !362 (merged) due to a bug in mv caused by the introduction of xattr handling in this commit that basically makes it behave like cp on Redox since we don't have extended attribute support.

The fact that we're taking this code path also means that regular "moves" are being treated as copies followed by removing the original. I'm not sure why that's happening yet, but it definitely isn't good for performance.