Implement support within Smart for handling RRECOMMENDS relationships
between RPM packages as used by OE. This includes support within the
base system for caching and resolving these relationships as well as
specific support in the RPM backend for reading the information from
packages, and reading the "missingok" flag added to createrepo for
rpm-md feeds.
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com> Signed-off-by: Saul Wold <sgw@linux.intel.com>