Fixed build failure w/ new sudo

bin/cbuildbot.py

 #!/usr/bin/python
 
 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """CBuildbot is wrapper around the build process used by the pre-flight queue"""
 
 import errno
 import heapq
@@ skipping 395 matching lines @@
 def _SetupBoard(buildroot, board='x86-generic'):
   """Wrapper around setup_board."""
   cwd = os.path.join(buildroot, 'src', 'scripts')
   RunCommand(['./setup_board', '--fast', '--default', '--board=%s' % board],
              cwd=cwd, enter_chroot=True)
 
 
 def _Build(buildroot, emptytree):
   """Wrapper around build_packages."""
   cwd = os.path.join(buildroot, 'src', 'scripts')
-  cmd = ['./build_packages']
   if emptytree:
-    cmd.insert(0, 'EXTRA_BOARD_FLAGS=--emptytree')
+    cmd = ['sh', '-c', 'EXTRA_BOARD_FLAGS=--emptytree ./build_packages']
+  else:
+    cmd = ['./build_packages']
 
   RunCommand(cmd, cwd=cwd, enter_chroot=True)
 
 
 def _BuildChrome(buildroot, board, chrome_atom_to_build):
   """Wrapper for emerge call to build Chrome."""
   cwd = os.path.join(buildroot, 'src', 'scripts')
   RunCommand(['emerge-%s' % board,
               '=%s' % chrome_atom_to_build],
              cwd=cwd, enter_chroot=True)
@@ skipping 370 matching lines @@
   except:
     # Send failure to master bot.
     if not buildconfig['master'] and buildconfig['important']:
       cbuildbot_comm.PublishStatus(cbuildbot_comm.STATUS_BUILD_FAILED)
 
     raise
 
 
 if __name__ == '__main__':
     main()