exclude platform_data_fetcher_linux.cc on *BSD because of udev specific code

build/linux/system.gyp

 # Copyright (c) 2011 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.
 
 {
   'conditions': [
     ['sysroot!=""', {
       'variables': {
         'pkg-config': './pkg-config-wrapper "<(sysroot)"',
       },
@@ skipping 611 matching lines @@
               '<!@(<(pkg-config) --libs-only-l wayland-client wayland-egl xkbcommon)',
             ],
           },
         }],
       ],
     },
     {
       'target_name': 'udev',
       'type': 'none',
       'conditions': [
-        ['_toolset=="target"', {
+        # libudev is not available on *BSD
+        ['_toolset=="target" and os_bsd!=1', {
           'direct_dependent_settings': {
             'cflags': [
               '<!@(<(pkg-config) --cflags libudev)'
             ],
           },
           'link_settings': {
             'ldflags': [
               '<!@(<(pkg-config) --libs-only-L --libs-only-other libudev)',
             ],
             'libraries': [
               '<!@(<(pkg-config) --libs-only-l libudev)',
             ],
           },
         }],
       ],
     },
   ],
 }