MB: Add libfuzzer bots.

tools-webrtc/mb/mb_config.pyl

Index: tools-webrtc/mb/mb_config.pyl
diff --git a/tools-webrtc/mb/mb_config.pyl b/tools-webrtc/mb/mb_config.pyl
index 7b3ff561d47d09a3f35176bdf5ecc5f01c1d1289..1a310dd566944d231ed45d734f459fe612f4ec1e 100644
--- a/tools-webrtc/mb/mb_config.pyl
+++ b/tools-webrtc/mb/mb_config.pyl
@@ -46,6 +46,7 @@
       'Linux UBSan': 'ubsan_clang_release_bot_x64',
       'Linux UBSan vptr': 'ubsan_vptr_clang_release_bot_x64',
       'Linux64 Release [large tests]': 'release_bot_x64',
+      'Linux64 Release (Libfuzzer)': 'libfuzzer_asan_release_bot_x64',
 
       # Android
       'Android32 (M Nexus5X)': 'android_release_bot_arm',
@@ -133,6 +134,7 @@
       'linux_ubsan': 'ubsan_clang_release_bot_x64',
       'linux_ubsan_vptr': 'ubsan_vptr_clang_release_bot_x64',
       'linux_baremetal': 'release_bot_x64',
+      'linux_libfuzzer_rel': 'libfuzzer_asan_release_bot_x64',
 
       # Android
       'android_compile_dbg': 'android_debug_static_bot_arm',
@@ -234,6 +236,9 @@
     'perf_release_bot_x64': [
       'gn', 'openh264', 'release', 'static', 'goma', 'x64'
     ],
+    'libfuzzer_asan_release_bot_x64': [
+      'libfuzzer', 'asan', 'openh264_release_bot', 'x64'
+    ],
     'memcheck_release_bot_x64': [
       'memcheck', 'gn', 'openh264_release_bot', 'x64'
     ],
@@ -370,6 +375,10 @@
       'gn_args': 'target_os="ios"',
     },
 
+    'libfuzzer': {
+      'gn_args': 'use_libfuzzer=true',
+    },
+
     'lsan': {
       'gn_args': 'is_lsan=true',
     },