[build] Switch x87 to swarming.

infra/mb/mb_config.pyl

 # Copyright 2016 The V8 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.
 
 {
   # 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.
   # Bots are ordered by appearance on waterfall.
   'masters': {
@@ skipping 207 matching lines @@
       'gyp', 'debug_bot', 'simulate_arm', 'asan', 'edge'],
     'gyp_debug_simulate_arm64': [
       'gyp', 'debug_bot', 'simulate_arm64', 'swarming'],
     'gyp_debug_simulate_arm64_asan_edge': [
       'gyp', 'debug_bot', 'simulate_arm64', 'asan', 'lsan', 'edge'],
     'gyp_debug_simulate_arm64_no_snap': [
       'gyp', 'debug_bot', 'simulate_arm64', 'swarming', 'v8_snapshot_none'],
     'gyp_debug_simulate_mipsel_asan_edge': [
       'gyp', 'debug_bot', 'simulate_mipsel', 'asan', 'edge'],
     'gyp_debug_simulate_x87_no_snap': [
-      'gyp', 'debug_bot', 'simulate_x87', 'v8_snapshot_none'],
+      'gyp', 'debug_bot', 'simulate_x87', 'swarming', 'v8_snapshot_none'],
 
     # Gyp debug configs for x64.
     'gyp_debug_x64': [
       'gyp', 'debug_bot', 'x64', 'swarming'],
     'gyp_debug_x64_asan_edge': [
       'gyp', 'debug_bot', 'x64', 'asan', 'lsan', 'edge'],
     'gyp_debug_x64_minimal_symbols': [
       'gyp', 'debug_bot', 'x64', 'minimal_symbols', 'swarming'],
 
     # Gyp debug configs for x86.
@@ skipping 385 matching lines @@
       'gn_args': 'target_cpu="x64"',
       'gyp_defines': 'target_arch=x64',
     },
 
     'x86': {
       'gn_args': 'target_cpu="x86"',
       'gyp_defines': 'target_arch=ia32',
     },
   },
 }