netfilter: ipt_LOG/ip6t_LOG: use more appropriate log level as default

Use KERN_NOTICE instead of KERN_EMERG by default. This only affects
kernel internal logging (like conntrack), user-specified logging rules
contain a seperate log level.
Signed-off-by: Patrick McHardy <kaber@trash.net>

net/ipv4/netfilter/ipt_LOG.c

@@ -367,7 +367,7 @@ static struct nf_loginfo default_loginfo = {
 	.type	= NF_LOG_TYPE_LOG,
 	.u = {
 		.log = {
-			.level    = 0,
+			.level    = 5,
 			.logflags = NF_LOG_MASK,
 		},
 	},

net/ipv6/netfilter/ip6t_LOG.c

@@ -377,7 +377,7 @@ static struct nf_loginfo default_loginfo = {
 	.type	= NF_LOG_TYPE_LOG,
 	.u = {
 		.log = {
-			.level	  = 0,
+			.level	  = 5,
 			.logflags = NF_LOG_MASK,
 		},
 	},