handle new binfmt suffix

scripts/update-rcconf

@@ -21,6 +21,9 @@ fi
 if [ ! -z ${ADK_TARGET_ABI} ];then
 	suffix=${suffix}_${ADK_TARGET_ABI}
 fi
+if [ ! -z ${ADK_TARGET_BINFMT} ];then
+	suffix=${suffix}_${ADK_TARGET_BINFMT}
+fi
 
 rcconf=$(ls $topdir/root_${suffix}/etc/rc.conf)