Also check for WebAppMgr as application host

With the separation of LunaSysMgr and WebAppMgr into two separate
components, there is now a second executable that must be granted
special permissions. If this is not done, web applications will not be
able to call system services.

This commit is 15efd37a6bc22e4e495b54ded959768eb538714b from
webOS-ports/luna-service2.

Open-webOS-DCO-1.0-Signed-off-by: Herb Kuta <herb.kuta@palm.com>
Open-webOS-DCO-1.0-Signed-off-by: Simon Busch <morphis@gravedo.de>
Change-Id: Id0d871e007c3b0e2157ec73bab3d6402fc427f68