Fix android envsetup permission issue.

envsetup.sh

+#!/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.
 
 # Sets up environment for building Chromium on Android.  It can either be
 # compiled with the Android tree or using the Android SDK/NDK. To build with
 # NDK/SDK: ". build/android/envsetup.sh".  Environment variable
 # ANDROID_SDK_BUILD=1 will then be defined and used in the rest of the setup to
 # specifiy build type.
 
+if [ "$_" == "$0" ]; then
+  echo "ERROR: envsetup must be sourced."
+  exit 1
+fi
+
 # Source functions script.  The file is in the same directory as this script.
 . "$(dirname $BASH_SOURCE)"/envsetup_functions.sh
 
 export ANDROID_SDK_BUILD=1  # Default to SDK build.
 
 process_options "$@"
 
 # When building WebView as part of Android we can't use the SDK. Other builds
 # default to using the SDK.
 if [[ "${CHROME_ANDROID_BUILD_WEBVIEW}" -eq 1 ]]; then
@@ skipping 128 matching lines @@
   # This is just a simple wrapper of gyp_chromium, please don't add anything
   # in this function.
   echo "GYP_GENERATORS set to '$GYP_GENERATORS'"
   (
     "${CHROME_SRC}/build/gyp_chromium" --depth="${CHROME_SRC}" --check "$@"
   )
 }
 
 # FLOCK needs to be null on system that has no flock
 which flock > /dev/null || export FLOCK=