License-Update: attr: Add a missing file to LIC_FILES_CHKSUM.
Although attr is licensed under LGPLv2.1 and GPLv2, LIC_FILES_CHKSUM
does not include license file of LGPLv2.1, COPYING.LGPL.
Signed-off-by: Akira Shibakawa <arabishi900@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>