Add COPYING to the license checksums, and update the checksum for unifdef.c as
the copyright dates changed.
(From OE-Core rev: 69ec72a2e3fc20c82ff06672674f9534312ebb14)
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Ross Burton