Fixes [YOCTO #8696]
Turns out the 'dnf' command is not yet supported for CentOS
as it is for Fedora, I changed the 'dnf' command back to
'yum'. Also, there were some essential packages that needed
to be added to CentOS. Finally, there was a slight
inconsistency in the Fedora list of essential packages and the
ones for supporting Graphics. I had a redundant listing of
one of the packages. I took that out of the Graphics area and
left it only in the essentials area.
(From yocto-docs rev: dde72542ca87bfdd82d713f90938a41c83ac8a4d)
Signed-off-by: Scott Rifenbark <srifenbark@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>