Made some review changes to the workflow structure, devtool
add flow, and devtool modify flow diagrams.
(From yocto-docs rev: f432d9b0270615974e67a0cc243560fdbfa44724)
Signed-off-by: Scott Rifenbark <srifenbark@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>