message: Wire Fingerprint to target unit's edition
diff: @@ -481,7 +481,7 @@ fn calculate<'a, 'cfg>(
  deps,
  local: vec![local],
  memoized_hash: Mutex::new(None),
  - edition: unit.pkg.manifest().edition(),
  + edition: unit.target.edition(),
  rustflags: extra_flags,
  });
  cx.fingerprints.insert(*unit, Arc::clone(&fingerprint));
  