lsof: update SRC_URI

The official lsof ftp site rejects download attempts from hosts for
which it can not perform a DNS reverse-lookup. See:

  https://people.freebsd.org/~abe/



Fix for long download timeout and warnings from the bitbake fetcher.

Signed-off-by: Andre McCurdy <armccurdy@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>