port row to clangcl
port row to clangcl

BUG=libyuv:487
R=harryjin@google.com

Review URL: https://webrtc-codereview.appspot.com/53799005.

lemenkov/libyuv,lemenkov/libyuv,yarrcc/libyuv-ios,yarrcc/libyuv-ios,lemenkov/libyuv,yarrcc/libyuv-ios,yarrcc/libyuv-ios,disigma/yuv,disigma/yuv,disigma/yuv,lemenkov/libyuv