I was just going to turn off parallel make but ended up fixing this properly.
(From OE-Core rev: 440a6d5aacf7807536feee5d09484712ba34ca80)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Joshua Lock <josh@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>