Add android landmine (force android clean build)

build/landmines.py

 #!/usr/bin/env python
 # 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.
 
 """
 This file holds a list of reasons why a particular build needs to be clobbered
 (or a list of 'landmines').
 
 This script runs every build as a hook. If it detects that the build should
@@ skipping 121 matching lines @@
   """
   ALL LANDMINES ARE DEFINED HERE.
   target is 'Release' or 'Debug'
   """
   landmines = []
   add = lambda item: landmines.append(item + '\n')
 
   if (distributor() == 'goma' and platform() == 'win32' and
       builder() == 'ninja'):
     add('Need to clobber winja goma due to backend cwd cache fix.')
+  if platform() == 'android':
+    add('Clean android out directories to reduce zip size.')
 
   return landmines
 
 
 def get_target_build_dir(build_tool, target, is_iphone=False):
   """
   Returns output directory absolute path dependent on build and targets.
   Examples:
     r'c:\b\build\slave\win\build\src\out\Release'
     '/mnt/data/b/build/slave/linux/build/src/out/Debug'
@@ skipping 66 matching lines @@
   gyp_helper.apply_chromium_gyp_env()
 
   for target in ('Debug', 'Release'):
     set_up_landmines(target)
 
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(main())