Implement component to access ls2 based services from QML

Signed-off-by: Simon Busch <morphis@gravedo.de>
Add luna service configuration files

We need to provide proper service configuration files in order to have access to the
public and private bus.

Signed-off-by: Simon Busch <morphis@gravedo.de>
Use cmake-modules-webos to install luna-service2 configuration files

Signed-off-by: Simon Busch <morphis@gravedo.de>