bletiny: Add support to connect/disconnect L2CAP LE COC
bletiny: Add support to connect/disconnect L2CAP LE COC

With this patch bletiny gets support to test LE COC.
In order to do this, new options to 'b l2cap' command has been added:
* create_srv psm=<psm>
* connect conn=<conn_handle> psm=<psm>
* disconnect idx=<idx>

In order to get 'idx' required to disconnect you should call

"b show coc"

X-Original-Commit: 8b73a4d81480d6753ff019cd26f89ef606b0b247

apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble