kmssctpbaserpc: set GST_BUFFER_FLAG_DISCONT flag in a buffer when the previous one has been lost

Change-Id: Ice02d3dd6d2218a5ac1313b1a1fcd104a2374603
SCTP: Increase sctpbuffer for sending and receiving data

Change-Id: I0f7e0ff8972398d7a41d1f6d25e9342bc30366ea