Add system dbus service for MDR V2

Add BIOS version and UUID in smbios table and provide dbus
interface for redfish to get these information.

Tested:
DC cycle the system and waiting for BIOS entering setup page.
Redfish should be able to show correct UUID.

Signed-off-by: Cheng C Yang <cheng.c.yang@linux.intel.com>
Change-Id: I0d364f27488d3efa24e4a9dde97086f09e94d2a2
diff --git a/include/mdrv2.hpp b/include/mdrv2.hpp
index 3dfedf5..772711d 100644
--- a/include/mdrv2.hpp
+++ b/include/mdrv2.hpp
@@ -176,6 +176,7 @@
     int getTotalDimmSlot(void);
     std::vector<std::unique_ptr<Cpu>> cpus;
     std::vector<std::unique_ptr<Dimm>> dimms;
+    std::unique_ptr<System> system;
 };
 
 } // namespace smbios