baseparse: Don't set DISCONT flag for audio buffer.
baseparse: Don't set DISCONT flag for audio buffer.

For unknown audio data,
the logic finding syncword in dcaparse may has problem.
So, we don't set DISCONT flag for audio buffer.

:Issues Addressed:
[MFTEVENTFT-31044] playback problem

Change-Id: Ia35ffd5346e843dcbbc660c66c2bec8ca7870011
Reviewed-on: https://gpro.lgsvl.com/71070
Tested-by: Kyungyong Kim <98624ce16864ce8313cc50e8ba2e9a537578d29d@lge.com>
Reviewed-by: Kyungyong Kim <98624ce16864ce8313cc50e8ba2e9a537578d29d@lge.com>

justinjoy/gstreamer,justinjoy/gstreamer,justinjoy/gstreamer,justinjoy/gstreamer,justinjoy/gstreamer