COPYING in libxfont2 upstream contains only one BSD-4-Clause text variant,
which is explicitly covered by the copyright addendum by University of
California. Change the SPDX license reference to BSD-4-Clause-UC.
License-Update: reference can be more specific
(From OE-Core rev: d40647566d6c4b39a657942cabcba17df0ed0c84)
Signed-off-by: Bastian Germann <bage@debian.org>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>