utils: Add missing headers
utils: Add missing headers

Add a few missing headers from utils.hpp.

Change-Id: I6efbceac3f583349e1db5b9135bd05da0270878e
Signed-off-by: Brad Bishop <713d098c0be4c8fd2bf36a94cd08699466677ecd@fuzziesquirrel.com>

openbmc/phosphor-inventory-manager,openbmc/phosphor-inventory-manager