add if defined(_MSC_FULL_VER) for NaCL
add if defined(_MSC_FULL_VER) for NaCL

TBR=kjellander@chromium.org
BUG=libyuv:573
TESTED=try bots

Review URL: https://codereview.chromium.org/1850053002 .

yarrcc/libyuv-ios,yarrcc/libyuv-ios,lemenkov/libyuv,yarrcc/libyuv-ios,lemenkov/libyuv,yarrcc/libyuv-ios,lemenkov/libyuv,lemenkov/libyuv