netfilter: xtables: reduce holes in struct xt_target

This will save one full padding chunk (8 bytes on x86_64) per target.
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>

include/linux/netfilter/x_tables.h

@@ -331,6 +331,7 @@ struct xt_target {
 	struct list_head list;
 
 	const char name[XT_FUNCTION_MAXNAMELEN-1];
+	u_int8_t revision;
 
 	/* Returns verdict. Argument order changed since 2.6.9, as this
 	   must now handle non-linear skbs, using skb_copy_bits and
@@ -363,7 +364,6 @@ struct xt_target {
 	unsigned short proto;
 
 	unsigned short family;
-	u_int8_t revision;
 };
 
 /* Furniture shopping... */