Remove 8-bit update, also bug fix for update. From Shawn Wang (xianglin.wang@nokia.com).

...264Extension/src/lib/H264AVCCommonLib/IntYuvPicBuffer.cpp

...Extension/src/lib/H264AVCCommonLib/MotionCompensation.cpp

...64Extension/src/lib/H264AVCCommonLib/QuarterPelFilter.cpp

JSVM/H264Extension/src/lib/H264AVCDecoderLib/GOPDecoder.cpp

JSVM/H264Extension/src/lib/H264AVCDecoderLib/GOPDecoder.h

JSVM/H264Extension/src/lib/H264AVCEncoderLib/GOPEncoder.cpp

JSVM/H264Extension/src/lib/H264AVCEncoderLib/GOPEncoder.h