nft: Pass a line after printing out a debug message

In this specific places, libnftnl gives back a string on which iptables
should not assume any line break, thus it's up to iptables to add it.

Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
diff --git a/iptables/nft.c b/iptables/nft.c
index d3b9bf0..1237659 100644
--- a/iptables/nft.c
+++ b/iptables/nft.c
@@ -458,7 +458,7 @@
 	char tmp[1024];
 
 	nft_table_snprintf(tmp, sizeof(tmp), t, 0, 0);
-	printf("DEBUG: table: %s", tmp);
+	printf("DEBUG: table: %s\n", tmp);
 	mnl_nlmsg_fprintf(stdout, nlh, nlh->nlmsg_len, sizeof(struct nfgenmsg));
 #endif
 
@@ -702,7 +702,7 @@
 	char tmp[1024];
 
 	nft_chain_snprintf(tmp, sizeof(tmp), c, 0, 0);
-	printf("DEBUG: chain: %s", tmp);
+	printf("DEBUG: chain: %s\n", tmp);
 	mnl_nlmsg_fprintf(stdout, nlh, nlh->nlmsg_len, sizeof(struct nfgenmsg));
 #endif
 }
@@ -898,7 +898,7 @@
 	char tmp[1024];
 
 	nft_rule_snprintf(tmp, sizeof(tmp), r, 0, 0);
-	printf("DEBUG: rule: %s", tmp);
+	printf("DEBUG: rule: %s\n", tmp);
 	mnl_nlmsg_fprintf(stdout, nlh, nlh->nlmsg_len, sizeof(struct nfgenmsg));
 #endif
 }