Change shebangs to allow the tools to be used out of the box without modification

on system that don't hard code bash's path.

For example, BSD's bash lives in /usr/local/bin on freebsd & openbsd.

Patch contributed by Sevan Janiyan (venture37 at gmail)

TEST=didn't break ubuntu users
BUG=none

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@66124 0039d316-1c4b-4281-b951-d872f2087c98

create-chromium-git-src

-#!/bin/bash -e
+#!/usr/bin/env -S bash -e
 #
 # Copyright (c) 2009 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be

drover

-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright (c) 2009 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.

gcl

-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright (c) 2009 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.

gclient

-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright (c) 2009 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.

update_depot_tools

-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright (c) 2010 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.