fix errors

Author: MarcusSorealheis

nativelink-worker/tests/running_actions_manager_test.rs

@@ -52,6 +52,8 @@ mod tests {
         HistoricalExecuteResponse, StartExecute,
     };
     use nativelink_proto::google::rpc::Status;
+    #[cfg(target_family = "unix")]
+    use nativelink_store::ac_utils::compute_buf_digest;
     use nativelink_store::ac_utils::{get_and_decode_digest, serialize_and_upload_message};
     use nativelink_store::fast_slow_store::FastSlowStore;
     use nativelink_store::filesystem_store::FilesystemStore;