Register new Control.Host bus in ipmid

This sets up the framework for future commits to implement
the required interfaces and signals in Control.Host

Change-Id: I43cd7d3047ed9cfbf1a01e7ba3a0310e9d47c307
Signed-off-by: Andrew Geissler <andrewg@us.ibm.com>
diff --git a/host-interface.hpp b/host-interface.hpp
index 793a5cb..56d19d1 100644
--- a/host-interface.hpp
+++ b/host-interface.hpp
@@ -28,6 +28,15 @@
                 sdbusplus::xyz::openbmc_project::Control::server::Host>(
                         bus, objPath)
         {}
+
+        /** @brief Send input command to host
+         *
+         * Note that the command will be queued in a FIFO if other commands
+         * to the host have yet to be run
+         *
+         * @param[in] command       - Input command to execute
+         */
+        void execute(Command command) override;
 };
 
 } // namespace host