Drop PREFERRED_VERSION_elfutils in meta/conf/distro/include/
tcmode-default.inc, it builds the latest version by default.
(From OE-Core rev: 7ff30c54439a761d66fd4ceca80073e3653373bf)
Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>