Manifest item reading tracked wrong key

When iterating over items the manifest would always insert
whatever values it found at the caller's key, instead of the
key that it found in the segment.

Signed-off-by: Zach Brown <zab@versity.com>

kmod/src/manifest.c

@@ -425,7 +425,7 @@ int scoutfs_manifest_read_items(struct super_block *sb, struct kvec *key)
 			}
 
 			/* remember new least key */
-			scoutfs_kvec_clone(found_key, key);
+			scoutfs_kvec_clone(found_key, item_key);
 			scoutfs_kvec_clone(found_val, item_val);
 			found = true;
 			had_found = 0;