MB: Add Linux 32-bit Debug and Release trybots

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 122 matching lines @@
       'mac_gn_dbg': 'gyp_debug_bot_x64_exclude_tests',
       'mac_gn_rel': 'gyp_release_bot_x64_exclude_tests',
       'mac_gyp_dbg': 'gyp_debug_bot_x64_exclude_tests',
       'mac_gyp_rel': 'gyp_release_bot_x64_exclude_tests',
 
       # Linux
       'linux_compile_dbg': 'gn_debug_bot_x64',
       'linux_compile_rel': 'gn_release_bot_x64',
       'linux_dbg': 'gn_debug_bot_x64',
       'linux_rel': 'gn_release_bot_x64',
+      'linux32_dbg': 'gn_debug_bot_x86',
+      'linux32_rel': 'gn_release_bot_x86',
       'linux_arm': 'gn_crosscompile_release_bot_arm',
       'linux_asan': 'gn_asan_lsan_clang_release_bot_x64',
       'linux_memcheck': 'gn_memcheck_release_bot_x64',
       'linux_msan': 'gn_msan_clang_release_bot_x64',
       'linux_tsan2': 'gn_tsan_clang_release_bot_x64',
       'linux_ubsan': 'gn_ubsan_clang_release_bot_x64',
       'linux_ubsan_vptr': 'gn_ubsan_vptr_clang_release_bot_x64',
       'linux_baremetal': 'gn_release_bot_x64',
       'linux_swarming': 'swarming_gn_debug_bot_x64',
       # TODO(kjellander): Remove the two GN configs below as soon we've renamed
@@ skipping 416 matching lines @@
       'gn_args': 'target_cpu="x64"',
       'gyp_defines': 'target_arch=x64',
     },
 
     'x86': {
       'gn_args': 'target_cpu="x86"',
       'gyp_defines': 'target_arch=ia32',
     },
   },
 }