Fix more hash bang lines.

Fixes #953.

benchmark.sh

@@ -1,3 +1,5 @@
+#!/bin/bash
+
 # Copyright 2018 Google LLC
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -12,7 +14,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-#!/bin/bash
 set -ex
 script_name=$0
 script_full_path=$(dirname "$0")

integration-test.sh

@@ -1,3 +1,5 @@
+#!/bin/bash
+
 # Copyright 2018 Google LLC
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -12,7 +14,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-#!/bin/bash
 set -ex
 
 GCS_BUCKET="${GCS_BUCKET:-gs://kaniko-test-bucket}"