When used in Neteq, Neteq performance improved from 13 to 33% with different
test configurations.
Output is not bit-exact with generic C code in file cross_correlation.c,
due to reduction of shift operations from using Neon registers, although in
theory now the result is more accurate than before.
Review URL: http://webrtc-codereview.appspot.com/333013
git-svn-id: http://webrtc.googlecode.com/svn/trunk@1350 4adac7df-926f-26a2-2b94-8c16560cd09d