This is a part of a refactor that will split the package manager
code so that it's possible to use other package managers in other
layers.
(From OE-Core rev: e4f07444276a88f336d5fe5e60688fcfb2f22df7)
Signed-off-by: Fredrik Gustafsson <fredrigu@axis.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>