dleyna-connector-dbus: Add recipe

dleyna-connector-dbus is a D-Bus connector library
depending on "dleyna-core", and needed by dLeyna
implementations (most notably "dleyna-server" and
"dleyna-renderer"). It allows them to discover D-Bus
buses, and to be started via D-Bus services files.

Signed-off-by: Manuel Bachmann <manuel.bachmann@iot.bzh>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>