[Android] Suppress findbugs stderr output.

build/android/pylib/cmd_helper.py

 # 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.
 
 """A wrapper for subprocess to make calling shell commands easier."""
 
 import logging
 import os
 import pipes
 import select
@@ skipping 127 matching lines @@
     args: A string or a sequence of program arguments. The program to execute is
       the string or the first item in the args sequence.
     cwd: If not None, the subprocess's current directory will be changed to
       |cwd| before it's executed.
     shell: Whether to execute args as a shell command. Must be True if args
       is a string and False if args is a sequence.
 
   Returns:
     The 2-tuple (exit code, output).
   """
+  status, stdout, stderr = GetCmdStatusOutputAndError(
+      args, cwd=cwd, shell=shell)
+
+  if stderr:
+    logging.critical(stderr)
+  if len(stdout) > 4096:
+    logging.debug('Truncated output:')
+  logging.debug(stdout[:4096])
+  return (status, stdout)
+
+def GetCmdStatusOutputAndError(args, cwd=None, shell=False):
+  """Executes a subprocess and returns its exit code, output, and errors.
+
+  Args:
+    args: A string or a sequence of program arguments. The program to execute is
+      the string or the first item in the args sequence.
+    cwd: If not None, the subprocess's current directory will be changed to
+      |cwd| before it's executed.
+    shell: Whether to execute args as a shell command. Must be True if args
+      is a string and False if args is a sequence.
+
+  Returns:
+    The 2-tuple (exit code, output).
+  """
   _ValidateAndLogCommand(args, cwd, shell)
   pipe = Popen(args, stdout=subprocess.PIPE, stderr=subprocess.PIPE,
                shell=shell, cwd=cwd)
   stdout, stderr = pipe.communicate()
-
-  if stderr:
-    logging.critical(stderr)
-  if len(stdout) > 4096:
-    logging.debug('Truncated output:')
-  logging.debug(stdout[:4096])
-  return (pipe.returncode, stdout)
+  return (pipe.returncode, stdout, stderr)
 
 
 class TimeoutError(Exception):
   """Module-specific timeout exception."""
 
   def __init__(self, output=None):
     super(TimeoutError, self).__init__()
     self._output = output
 
   @property
@@ skipping 94 matching lines @@
     buffer_output += data
     has_incomplete_line = buffer_output[-1] not in '\r\n'
     lines = buffer_output.splitlines()
     buffer_output = lines.pop() if has_incomplete_line else ''
     for line in lines:
       yield line
   if buffer_output:
     yield buffer_output
   if check_status and process.returncode:
     raise subprocess.CalledProcessError(process.returncode, cmd)