selftest/static-group: Add seat
With a group added to the seatd recipe, we need an entry in our
static group file for selftest.
(From OE-Core rev: 655d334584769a9b9d86cf8fab2c06bc0878d0b3)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Richard Purdie