[libfuzzer] registering ubsan build.

masters/master.chromium.fyi/slaves.cfg

 # -*- python -*-
 # ex: set syntax=python:
 
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # See master.experimental/slaves.cfg for documentation.
 
 
@@ skipping 722 matching lines @@
   {
     'master': 'ChromiumFYI',
     'builder': 'Chromium Win 10',
     'hostname': 'vm17-m1',
     'os': 'win',
     'version': 'win10',
     'bits': '64',
   },
   {
     'master': 'ChromiumFYI',
-    'builder': ['Libfuzzer Upload Linux ASan', 'Libfuzzer Upload Linux MSan'],
+    'builder': ['Libfuzzer Upload Linux ASan',
+                'Libfuzzer Upload Linux MSan',
+                'Libfuzzer Upload Linux UBSan'],
     'hostname': 'slave43-c1',
     'os': 'linux',
     'version': 'trusty',
     'bits': '64',
   },
   {
     'master': 'ChromiumFYI',
     'builder': 'MD Top Chrome ChromeOS non-material',
     'hostname': 'slave45-c1',
     'os': 'linux',
@@ skipping 18 matching lines @@
   },
   {
     'master': 'ChromiumFYI',
     'builder': 'MD Top Chrome Linux material',
     'hostname': 'slave69-c1',
     'os': 'linux',
     'version': 'trusty',
     'bits': '64',
   },
 ]