Fix for build on 32 bit neon BUG=none TESTED=nacl neon build R=harryjin@google.com, tpsiaki@google.com
Fix for build on 32 bit neon
BUG=none
TESTED=nacl neon build
R=harryjin@google.com, tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/34659004
hyper123/libyuv,wl-chuang/libyuv,StopProducing/libyuv,yzhikan/libyuv,VladDrake/libyuv,KerwinMa/libyuv,chucvv/libyuv,gigakuma/libyuv,aberejohn/libyuv,skufog/libyuv,fate-extra/libyuv,VladDrake/libyuv,dexcz/libyuv,alfahim/libyuv,dilagurung/libyuv,fate-extra/libyuv,ganzhijie/libyuv,uraran/libyuv,dexcz/libyuv,gigakuma/libyuv,KerwinMa/libyuv,VladDrake/libyuv,dilagurung/libyuv,mosterta/libyuv,WangYongHai/libyuv,skufog/libyuv,hajunho/libyuv,chucvv/libyuv,WangYongHai/libyuv,syoshimu/libyuv,dilagurung/libyuv,hajunho/libyuv,uraran/libyuv,sathishkumars3/libyuv,hyper123/libyuv,wl-chuang/libyuv,WangYongHai/libyuv,mosterta/libyuv,yzhikan/libyuv,aberejohn/libyuv,wl-chuang/libyuv,alfahim/libyuv,sathishkumars3/libyuv,mosterta/libyuv,syoshimu/libyuv,fate-extra/libyuv,RockySteveJobs/libyuv,ganzhijie/libyuv,Vairn/libyuv,syoshimu/libyuv,Vairn/libyuv,KerwinMa/libyuv,sathishkumars3/libyuv,aberejohn/libyuv,dexcz/libyuv,hajunho/libyuv,uditkumawat/libyuv,OrenHg/libyuv,RockySteveJobs/libyuv,bingerZhang/libyuv,hyper123/libyuv,RockySteveJobs/libyuv,chucvv/libyuv,uraran/libyuv,Vairn/libyuv,yzhikan/libyuv,bingerZhang/libyuv,OrenHg/libyuv,StopProducing/libyuv,uditkumawat/libyuv,StopProducing/libyuv,ganzhijie/libyuv,alfahim/libyuv,OrenHg/libyuv,skufog/libyuv,uditkumawat/libyuv,bingerZhang/libyuv,gigakuma/libyuv