build-seed: add harma

A new meta-facebook machine is supported in the openbmc/openbmc tree.
Add it to the build-seed so we can enable build testing on it.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I8298eba9d776c6fb1f9182be27bb29b5d4cfa88b
1 file changed