[backfire] target: standardize config file & patches dir names (2.6) * rename "config-default" file to "config-X.Y.Z" * rename "patches" dir to "patches-X.Y.Z" git-svn-id: svn://svn.openwrt.org/openwrt/branches/backfire@29321 3c298f89-4303-0410-b956-a3cf2f4a3e73