Revert 172828. This broke check_deps. You identified this problem

in the code review comments, not sure what went wrong. Was the wrong
patch set committed?
> Make it harder to accidentally run envsetup.sh in a subshell 
> (instead of sourcing it in the current shell).
> 
> 
> Review URL: https://chromiumcodereview.appspot.com/11547023

TBR=fischman@chromium.org
Review URL: https://codereview.chromium.org/11568008

git-svn-id: http://src.chromium.org/svn/trunk/src/build@172836 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

android/envsetup.sh

@@ -1,3 +1,5 @@
+#!/bin/bash
+
 # Copyright (c) 2012 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.