Update libyuv port

ports/libyuv/build.sh

 # Copyright 2014 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.
 
 EXECUTABLES="convert libyuv_unittest"
 
 # Workaround for arm-gcc bug:
 # https://code.google.com/p/nativeclient/issues/detail?id=3205
 # TODO(sbc): remove this once the issue is fixed
 if [[ "${NACL_ARCH}" == arm ]]; then
   NACLPORTS_CPPFLAGS+=" -mfpu=vfp"
 fi
 
 EnableGlibcCompat
 
-if [[ ${NACL_ARCH} == x86_64 ]]; then
-  NACLPORTS_CPPFLAGS+=" -DLIBYUV_DISABLE_X86=1"
-fi
-
 EXTRA_CMAKE_ARGS="-DTEST=ON"
 EXTRA_CMAKE_ARGS+=" -DGTEST_SRC_DIR=${GTEST_SRC}"
 
 TestStep() {
   # TODO(sbc): figure out why these tests fail
   # https://bugs.chromium.org/p/naclports/issues/detail?id=216
   if [[ ${NACL_ARCH} == i686 && ${TOOLCHAIN} == glibc ]]; then
     filter="--gtest_filter=-libyuvTest.Psnr:libyuvTest.Ssim"
   elif [[ ${NACL_ARCH} == x86_64 && ${TOOLCHAIN} == glibc ]]; then
     filter="--gtest_filter=-libyuvTest.ARGBRect_Unaligned"
   elif [[ ${NACL_ARCH} == pnacl ]]; then
-    filter="--gtest_filter=-libyuvTest.MJPGToI420:libyuvTest.MJPGToARGB"
+    filter="--gtest_filter="
+    filter+="-libyuvTest.MJPGToI420"
+    filter+=":libyuvTest.MJPGToARGB"
+    filter+=":LibYUVConvertTest.MJPGToI420"
+    filter+=":LibYUVConvertTest.MJPGToARGB"
   else
     filter=
   fi
 
   LogExecute ./libyuv_unittest.sh ${filter}
 }