Main: Sort hashed files before iterating

To ensure the start flag working properly it is required to have a
deterministic order to start with the same vector of hashed files each
run.

src/main.rs

@@ -64,6 +64,8 @@ fn run() -> Result<()> {
 
     let pool = ThreadPoolBuilder::new().num_threads(args.jobs as usize).build().unwrap();
 
+    hashed_files.sort();
+
     let hashed_files_len = hashed_files.len();
 
     if start != 0 {