GN: Build libvpx on POSIX x86

libvpx_srcs_x86_intrinsics.gypi

 # This file is generated. Do not edit.
-# Copyright (c) 2013 The Chromium Authors. All rights reserved.
+# Copyright (c) 2014 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.
 
 {
   'targets': [
     {
       'target_name': 'libvpx_intrinsics_mmx',
       'type': 'static_library',
       'include_dirs': [
         'source/config/<(OS_CATEGORY)/<(target_arch_full)',
@@ skipping 73 matching lines @@
           # cl.exe's /arch flag doesn't have a setting for SSSE3/4, and cl.exe
           # doesn't need it for intrinsics. clang-cl does need it, though.
           'msvs_settings': {
             'VCCLCompilerTool': { 'AdditionalOptions': [ '-msse4.1' ] },
           },
         }],
       ],
     },
   ],
 }