Temporarily disable nocompile tests on Linux ToT 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 1564 matching lines @@
 
     'chromeos_codecs': {
       'mixins': ['ffmpeg_branding_chromeos', 'proprietary_codecs'],
     },
 
     'chromeos_with_codecs': {
       'mixins': ['chromeos', 'chromeos_codecs'],
     },
 
     'clang_tot': {
-      'gn_args': 'llvm_force_head_revision=true clang_use_chrome_plugins=false',
+      'gn_args': 'llvm_force_head_revision=true clang_use_chrome_plugins=false enable_nocompile_tests=false',
       'mixins': ['clang'],
     },
 
     'clang': {
       'gn_args': 'is_clang=true',
     },
 
     'cronet': {
       'gn_args': ('disable_file_support=true disable_ftp_support=true '
                   'enable_websockets=false use_platform_icu_alternatives=true '
@@ skipping 273 matching lines @@
 
     'x64': {
       'gn_args': 'target_cpu="x64"',
     },
 
     'x86': {
       'gn_args': 'target_cpu="x86"',
     },
   },
 }