The dev-manual title changed to the Yocto Project Development Tasks
Manual and I fixed those links. Converted links that should have
been internal to the ref-manual but were external to the dev-manual.
(From yocto-docs rev: 6de68b04ce1b921466a462dfa3f3485232aaf40d)
Signed-off-by: Scott Rifenbark <srifenbark@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>