Add mb config and testing spec for new android clang x86 tester.

tools/mb/mb_config.pyl

 # Copyright 2015 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 is a map of buildbot master names -> buildbot builder names ->
   # config names (where each config name is a key in the 'configs' dict,
   # below). MB uses this dict to look up which config to use for a given bot.
   'masters': {
     'chromeos.chrome': {
@@ skipping 112 matching lines @@
       'CrWinClang': 'clang_official_release_bot_minimal_symbols_x86',
 
       'CrWinClang(dbg)': 'clang_debug_bot_minimal_symbols_x86',
       'CrWinClang64': 'clang_official_release_bot_minimal_symbols',
       'CrWinClang64(dll)': 'clang_minimal_symbols_shared_release_bot',
       'CrWinClangGoma': 'clang_official_optimize_release_bot_minimal_symbols_x86',
       'CrWinGoma': 'release_bot_x86',
       'CrWinGoma(dll)': 'shared_release_bot_x86',
       'ClangToTAndroidASan': 'android_clang_tot_asan',
       'ClangToTAndroid (dbg)': 'android_clang_tot_dbg',
+      'ClangToTAndroid x64': 'android_clang_tot_x64',
       'ClangToTLinux': 'clang_tot_linux_full_symbols_shared_release',
       'ClangToTLinux (dbg)': 'clang_tot_shared_debug',
       'ClangToTLinuxASan': 'clang_tot_asan_lsan_static_release',
       'ClangToTLinuxASanLibfuzzer': 'release_libfuzzer_asan_clang_tot',
       'ClangToTLinuxLLD': 'clang_tot_lld_release_shared',
       'ClangToTLinuxUBSanVptr': 'clang_tot_edge_ubsan_no_recover_hack_static_release',
       'ClangToTMac': 'clang_tot_minimal_symbols_shared_release',
       'ClangToTMac (dbg)': 'clang_tot_minimal_symbols_shared_debug',
       'ClangToTMacASan': 'asan_disable_nacl_clang_tot_full_symbols_static_release',
       'ClangToTWin': 'clang_tot_official_minimal_symbols_static_release_x86',
@@ skipping 543 matching lines @@
     ],
 
     'android_clang_tot_asan': [
       'android_without_codecs', 'clang_tot', 'asan', 'shared', 'debug', 'minimal_symbols',
     ],
 
     'android_clang_tot_dbg': [
       'android_without_codecs', 'clang_tot', 'shared', 'debug',
     ],
 
+    'android_clang_tot_x64': [
+      'android_without_codecs', 'clang_tot', 'shared', 'x64',
+    ],
+
     'android_cronet_data_reduction_proxy_release_bot_minimal_symbols_arm_no_neon': [
       'android', 'cronet', 'data_reduction_proxy', 'release_bot', 'minimal_symbols', 'arm_no_neon',
     ],
 
     'android_cronet_debug_static_bot_arm64': [
       'android', 'cronet', 'debug_static_bot', 'arm64',
     ],
 
     'android_cronet_debug_static_bot_arm_no_neon': [
       'android', 'cronet', 'debug_static_bot', 'arm_no_neon',
@@ skipping 1104 matching lines @@
       'gn_args': 'target_cpu="x86"',
     },
 
     'drfuzz': { 'gn_args': 'use_drfuzz=true' },
 
     'drmemory': {
       'gn_args': 'is_component_build=true enable_iterator_debugging=false',
     },
   },
 }