Neon does 8 at a time, so a check is added for any function of I422ToBGRA that width is >= 8 and for fast path that it is a multiple of 8 not 16. BUG=373 TESTED=untested R=brucedawson@google.com
Neon does 8 at a time, so a check is added for any function of I422ToBGRA that width is >= 8 and for fast path that it is a multiple of 8 not 16.
BUG=373
TESTED=untested
R=brucedawson@google.com

Review URL: https://webrtc-codereview.appspot.com/24059004
flykickbird/libyuv,flykickbird/libyuv,flykickbird/libyuv