webos-image: webos-connman-adapter=r3 (add connman-client)

:Release Notes:
This adds a runtime dependency on the connman client utility.

:Detailed Notes:
Having the connmanctl utility is very helpful for various
reasons. We already have the wpa_cli utility included by
default in every image so we should also include connmanctl
by default to have the counter part for connman available

:Testing Performed:
Build tested and verified client utility is included in
build image.

:QA Notes:

:Issues Addressed:
[BHV-3361] Include connmanctl in webos image
[BHV-3363] CCC: webos-connman-adapter=r3 (add connman-client)

Open-webOS-DCO-1.0-Signed-off-by: Simon Busch <simon.busch@lge.com>

Change-Id: I33e3decee931e9ee7fc5c3345286b5081be3a4e4
Reviewed-on: https://g2g.palm.com/5101
Reviewed-by: DCO Verification
Reviewed-by: Martin Jansa <Martin.Jansa@lge.com>
Tested-by: Martin Jansa <Martin.Jansa@lge.com>
Reviewed-by: Susan Montooth <susan.montooth@lge.com>