AIX: Disable backtrace API call

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 1933 matching lines @@
             ]},
             'sources': [
               'base/debug/stack_trace_posix.cc',
               'base/platform/platform-openbsd.cc',
               'base/platform/platform-posix.cc',
             ],
           }
         ],
         ['OS=="aix"', {
           'sources': [
+            'base/debug/stack_trace_posix.cc',
             'base/platform/platform-aix.cc',
             'base/platform/platform-posix.cc'
           ]},
         ],
         ['OS=="solaris"', {
             'link_settings': {
               'libraries': [
                 '-lnsl -lrt',
             ]},
             'sources': [
@@ skipping 455 matching lines @@
       'conditions': [
         ['want_separate_host_toolset_mkpeephole==1', {
           'toolsets': ['host'],
         }, {
           'toolsets': ['target'],
         }],
       ],
     },
   ],
 }