Add definition of ENABLE_DEBUGGER_SUPPORT to v8 gyp file

tools/gyp/v8.gyp

 # Copyright 2009 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 22 matching lines @@
     'target_arch%': 'ia32',
     'v8_use_snapshot%': 'true',
     'v8_regexp%': 'native',
   },
   'includes': [
     '../../../build/common.gypi',
   ],
   'target_defaults': {
     'defines': [
       'ENABLE_LOGGING_AND_PROFILING',
+      'ENABLE_DEBUGGER_SUPPORT',
     ],
     'conditions': [
       ['target_arch=="arm"', {
         'defines': [
           'V8_TARGET_ARCH_ARM',
         ],
       }],
       ['target_arch=="ia32"', {
         'defines': [
           'V8_TARGET_ARCH_IA32',
@@ skipping 517 matching lines @@
       ],
       'conditions': [
         [ 'OS=="win"', {
           # This could be gotten by not setting chromium_code, if that's OK.
           'defines': ['_CRT_SECURE_NO_WARNINGS'],
         }],
       ],
     },
   ],
 }