NEON J422ToABGR and H422ToABGR missing prototypes
NEON J422ToABGR and H422ToABGR missing prototypes

TBR=harryjin@google.com
BUG=none

Review URL: https://codereview.chromium.org/1351993003 .

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