WebRTC: Move libfuzzer bot to client.webrtc.fyi

masters/master.client.webrtc.fyi/slaves.cfg

 # Copyright 2013 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.
 
 slaves = [
   # Linux
   {
     'master': 'WebRTCFYI',
     'os': 'linux',
     'version': 'trusty',
     'bits': '64',
     'builder': [
       'Android32 Builder',
       'Auto-roll - WebRTC DEPS',
       'Linux32 ARM',
       'Linux64 GCC',
       'Linux64 Release (swarming)',
+      'Linux64 Release (Libfuzzer)',
     ],
     'hostname': 'slave23-c3',
   },
   # Bare-metal Linux 64-bit machines with Android devices connected.
   {
     'master': 'WebRTCFYI',
     'os': 'linux',
     'version': 'trusty',
     'bits': '64',
     'builder': [
@@ skipping 40 matching lines @@
     'master': 'WebRTCFYI',
     'os': 'win',
     'version': 'win7',
     'bits': '64',
     'builder': [
       'Win32 Release (swarming)',
     ],
     'hostname': 'vm303-m3',
   },
 ]