Fix HostArmQemu to build for emulator

[GF-2541] luna-sysmgr-common fails to build for qemux86

Reverting previous revert, re-instating the original version of this
change in commit 2219e9063030c9c4ccf4c6756efcef35eb02f242 but without
the "#include <SysMgrDeviceKeydefs.h>" which is no longer needed.

Open-webOS-DCO-1.0-Signed-off-by: Steve Lemke <steve.lemke@lge.com>

Change-Id: I50abc22a8784fb7bf28385fd9baee0a21b7a047e