fixing Java wrapper for mixChannels 'dst' should be treated as an input arg (epilog not needed)
fixing Java wrapper for mixChannels
'dst' should be treated as an input arg (epilog not needed)

opencv/opencv,opencv/opencv,apavlenko/opencv,apavlenko/opencv,opencv/opencv,opencv/opencv,apavlenko/opencv,apavlenko/opencv,opencv/opencv,apavlenko/opencv,opencv/opencv,opencv/opencv,opencv/opencv,apavlenko/opencv,opencv/opencv,opencv/opencv