l2test: Set CID due to socket restrictions for LE
l2test: Set CID due to socket restrictions for LE

Bluetooth kernel now restricts LE L2CAP sockets to ATT channels only.
For LE L2CAP socket bind, ATT CID is now mandatory. Reference: kernel patch
bfe4655f05d7ec4a7c0c1c7e4051862f824cd8ec

ComputeCycles/bluez,pstglia/external-bluetooth-bluez,pstglia/external-bluetooth-bluez,silent-snowman/bluez,ComputeCycles/bluez,mapfau/bluez,mapfau/bluez,ComputeCycles/bluez,mapfau/bluez,pkarasev3/bluez,silent-snowman/bluez,pstglia/external-bluetooth-bluez,pkarasev3/bluez,pstglia/external-bluetooth-bluez,pkarasev3/bluez,mapfau/bluez,pkarasev3/bluez,silent-snowman/bluez,ComputeCycles/bluez,silent-snowman/bluez