Use PKGE/PKGV/PKGR to build various package feed in tasks of pacakge_write_xxx.
(From OE-Core rev: c2872315905fcdf6e4bf11fe96e5ca62af3475f8)
Signed-off-by: Lianhao Lu <lianhao.lu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>