Upstream lsof releases are hosted on an ftp server which times out
download attempts from hosts for which it can not perform a DNS
reverse-lookup. See:
https://people.freebsd.org/~abe/
http://www.mirrorservice.org seems to be the most commonly used
alternative (and using it for SRC_URI allows the custom
UPSTREAM_CHECK_URI to be removed).
Signed-off-by: Andre McCurdy <armccurdy@gmail.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
