Otherwise it will use the openssl internal default of /usr/share/man which may not be correct.
(From OE-Core rev: f9b50b50544385260e0fc86e11836ec689f0cdd6)
Signed-off-by: Phil Blundell <philb@gnu.org>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>