Add adb_shell script for android

BUG=None
TEST=local
Review URL: https://webrtc-codereview.appspot.com/897008

git-svn-id: http://webrtc.googlecode.com/svn/trunk@2975 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/build/adb_shell.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+# Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
+#
+# Use of this source code is governed by a BSD-style license
+# that can be found in the LICENSE file in the root of the source
+# tree. An additional intellectual property rights grant can be found
+# in the file PATENTS.  All contributing project authors may
+# be found in the AUTHORS file in the root of the source tree.
+
+# 'adb shell' always returns "0" regardless of executable return code.
+# This handy script will return executable return code to shell which
+# can be used by buildbots.
+
+adb_shell () {
+  local RET ADB_LOG
+  ADB_LOG=$(mktemp "${TMPDIR:-/tmp}/adb-XXXXXXXX")
+  adb shell "$@" ";" echo \$? | tee "$ADB_LOG"
+  sed -i -e 's![[:cntrl:]]!!g' "$ADB_LOG"  # Remove \r.
+  RET=$(sed -e '$!d' "$ADB_LOG")           # Last line contains status code.
+  rm -f "$ADB_LOG"
+  return $RET
+}