Upgrade to version 3.7.
The COPYING file has been renamed as LICENSE, so adapt LIC_FILES_CHKSUM
accordingly.
(From OE-Core rev: 38e3d8f2f79a667dddf820f63c67715a5b096594)
Signed-off-by: Fabio Estevam <festevam@denx.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>