Add build target for nacl_io from the NaCl SDK.

native_client_sdk/native_client_sdk_untrusted.gyp

+# Copyright (c) 2013 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.
+
+{
+  'includes': [
+    '../build/common_untrusted.gypi',
+  ],
+  'conditions': [
+    ['disable_nacl==0 and disable_nacl_untrusted==0', {
+      'targets': [
+        {
+          'target_name': 'nacl_io_untrusted',
+          'type': 'none',
+          'variables': {
+            'nacl_untrusted_build': 1,
+            'nlib_target': 'libnacl_io.a',
+            'build_newlib': 1,
+          },
+          'include_dirs': [
+            '../native_client/src/untrusted/irt',
+            'src/libraries',
+            'src/libraries/nacl_io/include',
+            'src/libraries/third_party/newlib-extras',
+          ],
+          'direct_dependent_settings': {
+            'include_dirs': [
+              'src/libraries',
+              'src/libraries/nacl_io/include',
+              'src/libraries/third_party/newlib-extras',
+            ],
+          },
+          'sources': [
+            '>!@pymod_do_main(dsc_info -s -l src/libraries/nacl_io nacl_io)',
+          ],
+          'dependencies': [
+            '../native_client/tools.gyp:prep_toolchain',
+            '../ppapi/native_client/native_client.gyp:ppapi_lib',
+          ],
+        },
+      ],
+    }],
+  ],
+}