lib/oe/package_manager: keep platform_extra and default_platform_extra lists ordered
In RpmPM:insert_feeds_uris, the paths are kept in sets, which are unordered,
but they are later used to set the priority for the Smart channels, so
unexpected results could occur. Change the sets to lists and use the same
code as in create_configs() to add items to the list, rather than the set
operators.
[YOCTO #9717]
Signed-off-by: Bill Randle <william.c.randle@intel.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
