ASACORE-999: add socket shutdown(SHUT_WR)-like behavior

Change-Id: I8f6983b7289e013ac93cd741949d06f27b14d89d
Signed-off-by: Craig Dowell <cdowell@qce.qualcomm.com>
Merge "ASACORE-999: add socket shutdown(SHUT_WR)-like behavior" into feature/udp_transport