Fix bash shebang.
+#!/usr/bin/env bash
# Copyright 2019, The TensorFlow Federated Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
-#!/bin/bash
-
set -e
+
BAZEL=bazel
#### Constants ####
