Add Nlohmann-json to build phosphor-ipmi-host

The nlohmann package was recently added to the sysroot in Yocto.
Need to add it here in order to build phosphor-ipmi-host out of tree.

Change-Id: I52fc2b113e52e4497417509b581b6edac5f8fa6b
Signed-off-by: David Cobbley <david.j.cobbley@linux.intel.com>
1 file changed