There was confusion about how this actually worked when you
do not create a package for a package listed with the variable.
Cases for when the build would throw an error or not had to
be clarified.
(From yocto-docs rev: 02f95339322afe53db816b3b73234490d835b1ca)
Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>