validator_ragel: Link into TCB, use under env var

src/trusted/validator_ragel/dfa_validator_x86_64.gyp

+# Copyright (c) 2012 The Native Client Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# Build the specific library dependencies for validating on x86-64 using the
+# DFA-based validator.
+{
+  'includes': [
+    '../../../build/common.gypi',
+  ],
+  'target_defaults': {
+    'defines': [ 'NACL_TRUSTED_BUT_NOT_TCB' ],
+    'conditions': [
+      ['OS=="win"', {
+        'variables': {
+          'win_target': 'x64',
+         },
+        # TODO(pasko): eliminate flag modification based on OS.
+        # See http://code.google.com/p/nativeclient/issues/detail?id=2718
+        'cflags!': [
+          '/O1',
+        ],
+      }],
+    ],
+  },
+  'conditions': [
+    ['OS=="win" or target_arch=="x64"', {
+      'targets': [
+        {
+          'target_name': 'dfa_validate_x86_64',
+          'type': 'static_library',
+          'sources' : [
+            'unreviewed/dfa_validate_64.c',
+            'gen/validator-x86_64.c',
+          ],
+        },
+      ],
+    }],
+    [ 'target_arch=="arm" or target_arch=="ia32"', {
+      'targets': []
+    }],
+  ],
+}
+