rpm/kernel-binary.in: reassemble vanilla config from arch default and fragment
    
    This patch reassembles the vanilla config using the default config
    for the arch ("default" for everything but i386 which uses "pae") and
    the vanilla config fragment.
    
    This will do the right thing even if the vanilla config is still a
    standalone config, but scripts/kconfig/merge_config.sh will be slow.  Care
    should be taken to convert the vanilla configs on any branch that pulls
    this commit.
    
    Signed-off-by: Jeff Mahoney <jeffm@suse.com>