x32: disable turbofan for x32 port

tools/gyp/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 1127 matching lines @@
             '../../src/x64/lithium-codegen-x64.cc',
             '../../src/x64/lithium-codegen-x64.h',
             '../../src/x64/lithium-gap-resolver-x64.cc',
             '../../src/x64/lithium-gap-resolver-x64.h',
             '../../src/x64/lithium-x64.cc',
             '../../src/x64/lithium-x64.h',
             '../../src/x64/macro-assembler-x64.cc',
             '../../src/x64/macro-assembler-x64.h',
             '../../src/x64/regexp-macro-assembler-x64.cc',
             '../../src/x64/regexp-macro-assembler-x64.h',
-            '../../src/compiler/x64/code-generator-x64.cc',
-            '../../src/compiler/x64/instruction-codes-x64.h',
-            '../../src/compiler/x64/instruction-selector-x64.cc',
-            '../../src/compiler/x64/linkage-x64.cc',
             '../../src/ic/x64/access-compiler-x64.cc',
             '../../src/ic/x64/handler-compiler-x64.cc',
             '../../src/ic/x64/ic-x64.cc',
             '../../src/ic/x64/ic-compiler-x64.cc',
             '../../src/ic/x64/stub-cache-x64.cc',
           ],
         }],
+        ['v8_target_arch=="x64"', {
+          'sources': [
+            '../../src/compiler/x64/code-generator-x64.cc',
+            '../../src/compiler/x64/instruction-codes-x64.h',
+            '../../src/compiler/x64/instruction-selector-x64.cc',
+            '../../src/compiler/x64/linkage-x64.cc',
+          ],
+        }],
         ['OS=="linux"', {
             'link_settings': {
               'conditions': [
                 ['v8_compress_startup_data=="bz2"', {
                   'libraries': [
                     '-lbz2',
                   ]
                 }],
               ],
             },
@@ skipping 562 matching lines @@
         }],
         ['v8_compress_startup_data=="bz2"', {
           'libraries': [
             '-lbz2',
           ]
         }],
       ],
     },
   ],
 }