Use ICU for ID_START and ID_CONTINUE for Unicode 9 data

src/v8.gyp

 # Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 1940 matching lines @@
                   'defines': ['ICU_UTIL_DATA_IMPL=ICU_UTIL_DATA_SHARED'],
                 }, {
                   'defines': ['ICU_UTIL_DATA_IMPL=ICU_UTIL_DATA_STATIC'],
                 }],
               ],
             }],
           ],
         }, {  # v8_enable_i18n_support==0
           'sources!': [
             'builtins/builtins-intl.cc',
+            'char-predicates.cc',
             'intl.cc',
             'intl.h',
             'objects/intl-objects.cc',
             'objects/intl-objects.h',
             'runtime/runtime-intl.cc',
           ],
         }],
         ['OS=="win" and v8_enable_i18n_support==1', {
           'dependencies': [
             '<(icu_gyp_path):icudata',
@@ skipping 659 matching lines @@
         }],
         ['want_separate_host_toolset==1', {
           'toolsets': ['host'],
         }, {
           'toolsets': ['target'],
         }],
       ],
     },
   ],
 }