Add leading whitepace to EXTRA_OECONF_append so it doesn't rely on the original
value ending with trailing whitespace. Spotted by Robert P. J. Day.
(From OE-Core rev: b1b9a269ff94d80622f1c2a447568641039dc9ce)
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>