bts-trx: Log TRXC and TRXD socket recv()/send() failures
bts-trx: Log TRXC and TRXD socket recv()/send() failures

Related: OS#4215
Change-Id: Ic3e41d82b43459495d45873d612a3bd349ac174a

osmocom/osmo-bts,osmocom/osmo-bts,osmocom/osmo-bts