include: Fix missing header install
include: Fix missing header install

Change-Id: Iaf4646f6c50616ccf9daa8288a06f450bb0003ef
Signed-off-by: William A. Kennington III <30fff5198f4d10ca1117e5f3ec82f3b4b8900d81@google.com>

openbmc/stdplus,openbmc/stdplus