Seccomp sandbox changes (performance and correctness fixes, primarily targetting x86-32)

sandbox/sandbox.gyp

 # Copyright (c) 2009 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'target_defaults': {
     'variables': {
       'sandbox_windows_target': 0,
     },
     'target_conditions': [
@@ skipping 111 matching lines @@
         {
           'target_name': 'sandbox',
           'type': '<(library)',
           'dependencies': [
             '../base/base.gyp:base',
           ],
           'conditions': [
             ['target_arch!="arm"', {
               'sources': [
                 'linux/seccomp/access.cc',
+                'linux/seccomp/allocator.cc',
+                'linux/seccomp/allocator.h',
                 'linux/seccomp/clone.cc',
                 'linux/seccomp/exit.cc',
                 'linux/seccomp/debug.cc',
                 'linux/seccomp/getpid.cc',
                 'linux/seccomp/gettid.cc',
                 'linux/seccomp/ioctl.cc',
                 'linux/seccomp/ipc.cc',
                 'linux/seccomp/library.cc',
                 'linux/seccomp/library.h',
                 'linux/seccomp/linux_syscall_support.h',
@@ skipping 263 matching lines @@
       ],
     }],
   ],
 }
 
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