Somehow this slipped past the initial testing and can cause build errors in
non-GL distros.
(From OE-Core rev: 975412f446066215a94be78a7f7e1db9e28ebbbf)
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>