The existing patch wasn't fixing one issue it claimed to and seemed
incorrect in relation to the other.
This patch correctly addresses the parallel make issue, as seen on
our autobuilder.
(From OE-Core rev: c2d14d584929cc7c4fe7d03643cf9b918e31bda6)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>