Move assert.h/assert.cc from runtime/vm to runtime/platform

runtime/vm/vm.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': {
     'corelib_in_cc_file': 'corelib_in.cc',
     'corelib_cc_file': '<(SHARED_INTERMEDIATE_DIR)/corelib_gen.cc',
     'corelib_impl_in_cc_file': 'corelib_impl_in.cc',
     'corelib_impl_cc_file': '<(SHARED_INTERMEDIATE_DIR)/corelib_impl_gen.cc',
     'snapshot_test_dat_file': '<(SHARED_INTERMEDIATE_DIR)/snapshot_test.dat',
     'snapshot_test_in_dat_file': 'snapshot_test_in.dat',
     'snapshot_test_dart_file': 'snapshot_test.dart',
     'cygwin_dir': '../../third_party/cygwin',
   },
   'targets': [
     {
       'target_name': 'libdart_vm',
       'type': 'static_library',
       'includes': [
         'vm_sources.gypi',
+        '../platform/platform_headers.gypi',
         '../platform/platform_sources.gypi',
       ],
       'sources/': [
         # Exclude all _test.[cc|h] files.
         ['exclude', '_test\\.cc|h$'],
       ],
       'include_dirs': [
         '..',
       ],
       'conditions': [
@@ skipping 170 matching lines @@
             '--output', '<(snapshot_test_dat_file)',
             '--input_cc', '<(snapshot_test_in_dat_file)',
             '<(snapshot_test_dart_file)',
           ],
           'message': 'Generating ''<(snapshot_test_dat_file)'' file.'
         },
       ]
     },
   ]
 }