yocto-uninative: Update to 4.2 for glibc 2.38

Uninative 4.2 adds glibc 2.38.

Signed-off-by: Michael Halstead <mhalstead@linuxfoundation.org>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit c6654fab)
Signed-off-by: Steve Sakoman <steve@sakoman.com>