control: Add ObjectManager interface

Create the ObjectManager interface on the configured `CONTROL_OBJPATH`
given at configure time which defaults to
`/xyz/openbmc_project/control/thermal`. This is to handle obtaining the
dbus service name regardless if any configured dbus objects(zones)
should be created.

Change-Id: Ie05bc4a1b7bd8aee21df4bf3d38aed1e48be130c
Signed-off-by: Matthew Barth <msbarth@us.ibm.com>
2 files changed