MB: Add WebRTC FYI bots to mb_config.pyl.

We need this for the bots to be functional in client.webrtc.fyi.
Right now they're not really working since runhooks no longer runs GYP
(nor GN), and the MB step is not yet enabled in this waterfall.

BUG=webrtc:6287
NOTRY=True

Review-Url: https://codereview.webrtc.org/2312733002
Cr-Commit-Position: refs/heads/master@{#14070}

webrtc/build/mb_config.pyl

@@ -202,6 +202,26 @@
       'win_x64_gyp_dbg': 'gyp_debug_bot_x64_exclude_tests',
       'win_x64_gyp_rel': 'gyp_release_bot_x64_exclude_tests',
     },
+    'client.webrtc.fyi': {
+      # Mac
+      'Mac64 Release (swarming)': 'swarming_gn_release_bot_x64',
+
+      # Linux
+      'Linux32 Debug': 'gn_debug_bot_x86',
+      'Linux32 Release': 'gn_release_bot_x86',
+      'Linux64 GCC': 'gn_gcc_release_bot_x64',
+      'Linux64 Release (swarming)': 'swarming_gn_release_bot_x64',
+
+      # Android
+      'Android32 ASan (L Nexus6)': 'android_gn_asan_shared_release_bot_arm',
+      'Android32 Builder': 'android_gn_release_bot_arm',
+      'Android32 Tests (J Nexus4)': 'none',
+      'Android32 Tests (K Nexus5)': 'none',
+      'Android32 Tests (L Nexus6)': 'none',
+
+      # Windows
+      'Win32 Release (swarming)': 'swarming_gn_release_bot_x86',
+    }
   },
 
   # This is the list of configs that you can pass to mb; each config
@@ -237,6 +257,9 @@
     ],
 
     # Linux, Mac and Windows
+    'gn_gcc_release_bot_x64': [
+      'gn', 'gcc', 'release_bot', 'x64'
+    ],
     'gn_crosscompile_release_bot_arm': [
       'gn', 'crosscompile', 'openh264_release_bot', 'arm'
     ],
@@ -276,9 +299,15 @@
     'gn_release_bot_x64': [
       'gn', 'openh264_release_bot', 'x64'
     ],
+    'swarming_gn_release_bot_x86': [
+      'swarming', 'gn', 'openh264_release_bot', 'x86'
+    ],
     'swarming_gn_debug_bot_x64': [
       'swarming', 'gn', 'openh264_debug_bot', 'x64'
     ],
+    'swarming_gn_release_bot_x64': [
+      'swarming', 'gn', 'openh264_release_bot', 'x64'
+    ],
 
     # Windows
     'win_gn_clang_debug_bot_x86': [
@@ -341,6 +370,9 @@
     'android_gn_debug_static_bot_x64': [
       'android', 'gn', 'debug_static_bot', 'x64'
     ],
+    'android_gn_asan_shared_release_bot_arm': [
+      'android', 'gn', 'asan', 'clang', 'shared', 'release_bot', 'arm'
+    ],
 
     # This is used for tracking purposes; any bot that uses this config
     # should never actually run MB.
@@ -421,6 +453,11 @@
       'gyp_defines': 'target_arch=unknown',
     },
 
+    'gcc': {
+      'gn_args': 'is_clang=false use_sysroot=false',
+      'gyp_defines': 'clang=0',
+    },
+
     'gn': {'type': 'gn'},
 
     'goma': {