build: set language to C++
build: set language to C++

Set the language in the build to C++.

Change-Id: Ib1d19c2c05676d7f4bc2095c8492560e8c77f068
Signed-off-by: Patrick Venture <36c53fa43f47f3fd67cb2fc38031827244d18a1f@google.com>

openbmc/phosphor-host-ipmid,openbmc/phosphor-host-ipmid,openbmc/phosphor-host-ipmid