MB: Fix typo for android_arm64_rel trybot.

webrtc/build/mb_config.pyl

 # Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 # FOR DETAILS ON THIS FILE SEE THE MAIN COPY IN //tools/mb/mb_config.pyl.
 # This is configuration for standalone WebRTC bots. It is used to keep the bot
@@ skipping 85 matching lines @@
       'android_compile_rel': 'android_gyp_release_bot_arm',
       'android_compile_arm64_dbg': 'android_gyp_debug_bot_arm64',
       'android_compile_arm64_rel': 'android_gyp_release_bot_arm64',
       'android_compile_x86_dbg': 'android_gyp_debug_bot_x86',
       'android_compile_x86_rel': 'android_gyp_release_bot_x86',
       'android_compile_x64_dbg': 'android_gyp_debug_bot_x64',
       'android_compile_mips_dbg': 'android_gyp_clang_debug_bot_mipsel',
       'android_dbg': 'android_gyp_debug_bot_arm',
       'android_rel': 'android_gyp_release_bot_arm',
       'android_clang_dbg': 'android_gyp_clang_debug_bot_arm',
-      'android_amd64_rel': 'android_gyp_release_bot_arm64',
+      'android_arm64_rel': 'android_gyp_release_bot_arm64',
       'android_n6': 'android_gyp_debug_bot_arm',
       'android_gn_dbg': 'android_gn_debug_bot_arm',
       'android_gn_rel': 'android_gn_release_bot_arm',
     },
   },
 
   # This is the list of configs that you can pass to mb; each config
   # represents a particular combination of GYP_DEFINES/gn args that
   # we must support. A given config *may* be platform-specific but
   # is not necessarily so (i.e., we might have mac, win, and linux
@@ skipping 274 matching lines @@
       'gn_args': 'target_cpu="x64"',
       'gyp_defines': 'target_arch=x64',
     },
 
     'x86': {
       'gn_args': 'target_cpu="x86"',
       'gyp_defines': 'target_arch=ia32',
     },
   },
 }