Fix libyuv_tests.py to handle recent Chromium changes.
Fix libyuv_tests.py to handle recent Chromium changes.

This CL contains the same changes as in WebRTC revision
4957 and r4959. This will make the tests run properly
on the memcheck and tsan bots again.

TEST=compiled and successfully ran from the parent dir of trunk:
trunk/tools/valgrind-libyuv/libyuv_tests.sh --test libyuv_unittest --tool memcheck --target Release --build-dir trunk/out
TBR=fbarchard@google.com

Review URL: https://webrtc-codereview.appspot.com/4049004

git-svn-id: a51711482b6ba0e1d1ab095578a045eeae45ac9a@860 16f28f9a-4ce2-e073-06de-1de4eb20be90

labdong801/libyuv,lemenkov/libyuv,okumura/libyuv,laperry1/android_external_chromium_org_third_party_libyuv,disigma/yuv,MIPS/external-chromium_org-third_party-libyuv,granalberto/libyuv,openpeer/libyuv,okumura/chromium-external-libyuv,labdong801/libyuv,Omegaphora/external_chromium_org_third_party_libyuv,android-ia/platform_external_chromium_org_third_party_libyuv,phlizik/libyuv,granalberto/libyuv,pol51/libyuv-CMake,bpsinc-native/src_third_party_libyuv,lemenkov/libyuv,CyanogenMod/android_external_chromium_org_third_party_libyuv,MIPS/external-chromium_org-third_party-libyuv,android-ia/platform_external_chromium_org_third_party_libyuv,granalberto/libyuv,jpxiong/libyuv,xlncz/libyuv,yarrcc/libyuv-ios,jgcaaprom/android_external_chromium_org_third_party_libyuv,lyx2014/libyuv_free,archos-sa/libyuv-avp,laperry1/android_external_chromium_org_third_party_libyuv,Gekkio/libyuv,MIPS/external-chromium_org-third_party-libyuv,yarrcc/libyuv-ios,pol51/libyuv-CMake,okumura/chromium-external-libyuv,CyanogenMod/android_external_chromium_org_third_party_libyuv,AOSPU/external_chromium_org_third_party_libyuv,PeterXu/libyuv,AOSPU/external_chromium_org_third_party_libyuv,lyx2014/yuv,lyx2014/yuv,bpsinc-native/src_third_party_libyuv,archos-sa/libyuv-avp,openpeer/libyuv,lemenkov/libyuv,PeterXu/libyuv,disigma/yuv,lyx2014/yuv,archos-sa/libyuv-avp,openpeer/libyuv,granalberto/libyuv,rig-project/libyuv,rig-project/libyuv,phlizik/libyuv,Omegaphora/external_chromium_org_third_party_libyuv,PeterXu/libyuv,laperry1/android_external_chromium_org_third_party_libyuv,geekboxzone/lollipop_external_chromium_org_third_party_libyuv,okumura/libyuv,Omegaphora/external_chromium_org_third_party_libyuv,xlncz/libyuv,godghdai/libyuv,xin3liang/platform_external_chromium_org_third_party_libyuv,disigma/yuv,bpsinc-native/src_third_party_libyuv,pol51/libyuv-CMake,android-ia/platform_external_chromium_org_third_party_libyuv,jgcaaprom/android_external_chromium_org_third_party_libyuv,jpxiong/libyuv,jgcaaprom/android_external_chromium_org_third_party_libyuv,xin3liang/platform_external_chromium_org_third_party_libyuv,Gekkio/libyuv,yarrcc/libyuv-ios,lyx2014/libyuv_free,Gekkio/libyuv,rig-project/libyuv,lyx2014/libyuv_free,Bilibili/libyuv,godghdai/libyuv,lemenkov/libyuv,geekboxzone/lollipop_external_chromium_org_third_party_libyuv,phlizik/libyuv,okumura/chromium-external-libyuv,geekboxzone/lollipop_external_chromium_org_third_party_libyuv,Bilibili/libyuv,AOSPU/external_chromium_org_third_party_libyuv,yarrcc/libyuv-ios,jpxiong/libyuv,godghdai/libyuv,labdong801/libyuv,xin3liang/platform_external_chromium_org_third_party_libyuv,lyx2014/libyuv_free,Bilibili/libyuv,CyanogenMod/android_external_chromium_org_third_party_libyuv,xlncz/libyuv,lyx2014/yuv,okumura/libyuv,xlncz/libyuv