Add mb config for a 64 bit android bot on chromium.swarm

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 .pyl, or "Python Literal", file. You can treat it just like a
 # .json file, with the following exceptions:
 # * all keys must be quoted (use single quotes, please);
 # * comments are allowed, using '#' syntax; and
 # * trailing commas are allowed.
 
@@ skipping 325 matching lines @@
     },
 
     'chromium.perf.fyi': {
       'Android Builder FYI': 'official_goma_minimal_symbols_android',
       'Win Builder FYI': 'official_goma',
       'Win Clang Builder': 'official_goma_minimal_symbols_clang',
       'Battor Agent Linux': 'debug_bot',
     },
 
     'chromium.swarm': {
-      'Android Swarm': 'android_without_codecs_release_bot_minimal_symbols',
+      'Android N5 Swarm': 'android_release_bot_minimal_symbols',
+      'Android N5X Swarm': 'android_release_bot_minimal_symbols_arm64',
       'Linux Swarm': 'release_bot',
       'Mac Swarm': 'release_bot_mac_strip',
       'Windows Swarm': 'release_bot_x86',
     },
 
     'client.nacl.sdk': {
       'linux-sdk-asan-multi': 'release_bot',
       'linux-sdk-multi': 'release_bot',
       'linux-sdk-multirel': 'release_bot',
       'mac-sdk-multi': 'release_bot',
@@ skipping 1557 matching lines @@
 
     'x64': {
       'gn_args': 'target_cpu="x64"',
     },
 
     'x86': {
       'gn_args': 'target_cpu="x86"',
     },
   },
 }