Cherry pick vp8 halfpix variance fix

libvpx_srcs_x86_intrinsics.gypi

 # This file is generated. Do not edit.
 # 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',
@@ skipping 21 matching lines @@
         '<(libvpx_source)/vp8/common/x86/recon_wrapper_sse2.c',
         '<(libvpx_source)/vp8/encoder/x86/denoising_sse2.c',
         '<(libvpx_source)/vp8/encoder/x86/vp8_enc_stubs_sse2.c',
         '<(libvpx_source)/vp8/encoder/x86/vp8_quantize_sse2.c',
         '<(libvpx_source)/vp9/common/x86/vp9_idct_intrin_sse2.c',
         '<(libvpx_source)/vp9/encoder/x86/vp9_avg_intrin_sse2.c',
         '<(libvpx_source)/vp9/encoder/x86/vp9_dct_sse2.c',
         '<(libvpx_source)/vp9/encoder/x86/vp9_denoiser_sse2.c',
         '<(libvpx_source)/vp9/encoder/x86/vp9_quantize_sse2.c',
         '<(libvpx_source)/vpx_dsp/x86/fwd_txfm_sse2.c',
+        '<(libvpx_source)/vpx_dsp/x86/halfpix_variance_sse2.c',
         '<(libvpx_source)/vpx_dsp/x86/inv_txfm_sse2.c',
         '<(libvpx_source)/vpx_dsp/x86/loopfilter_sse2.c',
         '<(libvpx_source)/vpx_dsp/x86/quantize_sse2.c',
         '<(libvpx_source)/vpx_dsp/x86/variance_sse2.c',
       ],
       'cflags': [ '-msse2', ],
       'xcode_settings': { 'OTHER_CFLAGS': [ '-msse2' ] },
     },
     {
       'target_name': 'libvpx_intrinsics_ssse3',
@@ skipping 61 matching lines @@
       'cflags': [ '-mavx2', ],
       'xcode_settings': { 'OTHER_CFLAGS': [ '-mavx2' ] },
       'msvs_settings': {
         'VCCLCompilerTool': {
           'EnableEnhancedInstructionSet': '5', # /arch:AVX2
         },
       },
     },
   ],
 }