libyuv: Add Android x86, x64 and MIPS bots.

masters/master.tryserver.libyuv/slaves.cfg

 # Copyright (c) 2013 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.
 
 slaves = [
   # Linux.
   {
     'master': 'LibyuvTryServer',
     'os': 'linux',
     'version': 'precise',
     'bits': '64',
     'builder': [
       'linux',
       'linux_rel',
       'linux_gn',
       'linux_gn_rel',
       'linux_asan',
       'linux_memcheck',
       'linux_msan',
       'linux_tsan2',
       'linux_ubsan',
       'linux_ubsan_vptr',
       'android',
       'android_rel',
       'android_gn',
       'android_gn_rel',
       'android_clang',
       'android_arm64',
+      'android_x86',
+      'android_x64',
+      'android_mips',
     ],
     'hostname': 'slave%d-c4' % i,
   } for i in range(498, 500) + [139]
 ] + [
   # Mac.
   {
     'master': 'LibyuvTryServer',
     'os': 'mac',
     'version': '10.8',
     'bits': '64',
@@ skipping 23 matching lines @@
       'win_x64_rel',
       'win_x64_gn',
       'win_x64_gn_rel',
       'win_clang',
       'win_clang_rel',
       'win_x64_clang_rel',
     ],
     'hostname': 'vm%d-m4' % i,
   } for i in [152, 789]
 ]