Don't include platform_sources in libvmservice_io

runtime/bin/bin.gypi

 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 {
   'variables': {
     'gen_source_dir': '<(SHARED_INTERMEDIATE_DIR)',
 
     'io_cc_file': '<(gen_source_dir)/io_gen.cc',
     'io_patch_cc_file': '<(gen_source_dir)/io_patch_gen.cc',
@@ skipping 171 matching lines @@
       'target_name': 'libvmservice_io',
       'type': 'static_library',
       'toolsets': ['host', 'target'],
       'include_dirs': [
         '..',
         '../include',
       ],
       'includes': [
         'io_impl_sources.gypi',
         'builtin_impl_sources.gypi',
-        '../platform/platform_sources.gypi',
       ],
       'dependencies': [
         'generate_builtin_cc_file#host',
         'generate_io_cc_file#host',
         'generate_io_patch_cc_file#host',
         'generate_snapshot_file#host',
         'generate_resources_cc_file#host',
       ],
       'sources': [
         'builtin_common.cc',
@@ skipping 603 matching lines @@
         }],
         ['OS=="linux"', {
           'cflags': [
             '-fPIC',
           ],
         }],
       ],
     },
   ],
 }