Provided more detail on what the user can do with configuration files
to use the changed runqemu.
(From yocto-docs rev: 5dee8ceca290fdc8f3b41e0eba6565494190ce4f)
Signed-off-by: Scott Rifenbark <srifenbark@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>