seccomp-bpf-helpers: Fix undefined reference

sandbox/linux/sandbox_linux.gypi

 # Copyright (c) 2012 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.
 
 {
   'variables': {
     'conditions': [
       ['OS=="linux"', {
         'compile_suid_client': 1,
         'compile_credentials': 1,
@@ skipping 36 matching lines @@
       'conditions': [
         [ 'compile_suid_client==1', {
           'dependencies': [
             'suid_sandbox_client',
           ],
         }],
         # Compile seccomp BPF when we support it.
         [ 'use_seccomp_bpf==1', {
           'dependencies': [
             'seccomp_bpf',
-            'seccomp_bpf_helpers',
           ],
         }],
       ],
     },
     {
       'target_name': 'sandbox_linux_test_utils',
       'type': 'static_library',
       'dependencies': [
         '../testing/gtest.gyp:gtest',
       ],
@@ skipping 66 matching lines @@
         'bpf_dsl/linux_syscall_ranges.h',
         'bpf_dsl/policy.cc',
         'bpf_dsl/policy.h',
         'bpf_dsl/policy_compiler.cc',
         'bpf_dsl/policy_compiler.h',
         'bpf_dsl/seccomp_macros.h',
         'bpf_dsl/seccomp_macros.h',
         'bpf_dsl/syscall_set.cc',
         'bpf_dsl/syscall_set.h',
         'bpf_dsl/trap_registry.h',
+        'seccomp-bpf-helpers/baseline_policy.cc',
+        'seccomp-bpf-helpers/baseline_policy.h',
+        'seccomp-bpf-helpers/sigsys_handlers.cc',
+        'seccomp-bpf-helpers/sigsys_handlers.h',
+        'seccomp-bpf-helpers/syscall_parameters_restrictions.cc',
+        'seccomp-bpf-helpers/syscall_parameters_restrictions.h',
+        'seccomp-bpf-helpers/syscall_sets.cc',
+        'seccomp-bpf-helpers/syscall_sets.h',
         'seccomp-bpf/die.cc',
         'seccomp-bpf/die.h',
         'seccomp-bpf/sandbox_bpf.cc',
         'seccomp-bpf/sandbox_bpf.h',
         'seccomp-bpf/syscall.cc',
         'seccomp-bpf/syscall.h',
         'seccomp-bpf/trap.cc',
         'seccomp-bpf/trap.h',
       ],
       'dependencies': [
         '../base/base.gyp:base',
         'sandbox_services',
         'sandbox_services_headers',
       ],
       'defines': [
         'SANDBOX_IMPLEMENTATION',
       ],
       'includes': [
         # Disable LTO due to compiler bug
         # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57703
         '../../build/android/disable_gcc_lto.gypi',
       ],
       'include_dirs': [
         '../..',
       ],
     },
     {
-      'target_name': 'seccomp_bpf_helpers',
-      'type': '<(component)',
-      'sources': [
-        'seccomp-bpf-helpers/baseline_policy.cc',
-        'seccomp-bpf-helpers/baseline_policy.h',
-        'seccomp-bpf-helpers/sigsys_handlers.cc',
-        'seccomp-bpf-helpers/sigsys_handlers.h',
-        'seccomp-bpf-helpers/syscall_parameters_restrictions.cc',
-        'seccomp-bpf-helpers/syscall_parameters_restrictions.h',
-        'seccomp-bpf-helpers/syscall_sets.cc',
-        'seccomp-bpf-helpers/syscall_sets.h',
-      ],
-      'dependencies': [
-        '../base/base.gyp:base',
-        'sandbox_services',
-        'seccomp_bpf',
-      ],
-      'defines': [
-        'SANDBOX_IMPLEMENTATION',
-      ],
-      'include_dirs': [
-        '../..',
-      ],
-    },
-    {
       # The setuid sandbox, for Linux
       'target_name': 'chrome_sandbox',
       'type': 'executable',
       'sources': [
         'suid/common/sandbox.h',
         'suid/common/suid_unsafe_environment_variables.h',
         'suid/process_util.h',
         'suid/process_util_linux.c',
         'suid/sandbox.c',
       ],
@@ skipping 219 matching lines @@
             '../../build/isolate.gypi',
           ],
           'sources': [
             '../sandbox_linux_unittests.isolate',
           ],
         },
       ],
     }],
   ],
 }