rootfs_rpm: Add Multilib prefix to installed_packages list
RPM does not name it's packages with the Multilib prefix,
but the rootfs_rpm class keeps track of the Multilib prefixs
in a list. Use that list to re-attach the prefix for use with
the license bbclass, buildhistory bbclass will also use this
and make it more accurate between multilib and non-multilib.
Use the embedded "Platform" information to ensure we get all
the correct matching.
Signed-off-by: Saul Wold <sgw@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>