Really disable symbols on the ToT Windows LLD bots

tools/mb/mb_config.pyl

 # Copyright 2015 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.
 
 # This is a .pyl, or "Python Literal", file. You can treat it just like a
 # .json file, with the following exceptions:
 # * all keys must be quoted (use single quotes, please);
 # * comments are allowed, using '#' syntax; and
 # * trailing commas are allowed.
 
@@ skipping 1107 matching lines @@
 
     'clang_tot_full_symbols_shared_debug_use_lld_x86': [
       'clang_tot', 'full_symbols', 'shared', 'debug', 'use_lld', 'x86',
     ],
 
     'clang_tot_minimal_symbols_shared_debug_x86': [
       'clang_tot', 'minimal_symbols', 'shared', 'debug', 'x86',
     ],
 
     'clang_tot_shared_release_use_lld': [
-      'clang_tot', 'shared', 'release', 'use_lld',
+      # TODO(crbug.com/706492): Enable symbols when LLD makes PDBs.
+      'clang_tot', 'no_symbols', 'shared', 'release', 'use_lld',
     ],
 
     'clang_tot_official_static_use_lld_x86': [
-      'clang_tot', 'official', 'static', 'release', 'use_lld', 'x86',
+      # TODO(crbug.com/706492): Enable symbols when LLD makes PDBs.
+      'clang_tot', 'no_symbols', 'official', 'static', 'release', 'use_lld', 'x86',
     ],
 
     'clang_tot_minimal_symbols_shared_release': [
       'clang_tot', 'minimal_symbols', 'shared', 'release',
     ],
 
     'clang_tot_shared_release': [
       'clang_tot', 'shared', 'release',
     ],
 
@@ skipping 785 matching lines @@
 
     'x64': {
       'gn_args': 'target_cpu="x64"',
     },
 
     'x86': {
       'gn_args': 'target_cpu="x86"',
     },
   },
 }