remove extra newline from perror() calls

perror error adds a newline, so don't split error message
across two lines.

ip/ipaddress.c

@@ -317,7 +317,7 @@ int print_linkinfo(const struct sockaddr_nl *who,
 static int flush_update(void)
 {
 	if (rtnl_send(&rth, filter.flushb, filter.flushp) < 0) {
-		perror("Failed to send flush request\n");
+		perror("Failed to send flush request");
 		return -1;
 	}
 	filter.flushp = 0;

ip/ipneigh.c

@@ -88,7 +88,7 @@ int nud_state_a2n(unsigned *state, char *arg)
 static int flush_update(void)
 {
 	if (rtnl_send(&rth, filter.flushb, filter.flushp) < 0) {
-		perror("Failed to send flush request\n");
+		perror("Failed to send flush request");
 		return -1;
 	}
 	filter.flushp = 0;

ip/iproute.c

@@ -113,7 +113,7 @@ static struct
 static int flush_update(void)
 {
 	if (rtnl_send(&rth, filter.flushb, filter.flushp) < 0) {
-		perror("Failed to send flush request\n");
+		perror("Failed to send flush request");
 		return -1;
 	}
 	filter.flushp = 0;

ip/xfrm_policy.c

@@ -784,7 +784,7 @@ static int xfrm_policy_list_or_deleteall(int argc, char **argv, int deleteall)
 			}
 
 			if (rtnl_send(&rth, xb.buf, xb.offset) < 0) {
-				perror("Failed to send delete-all request\n");
+				perror("Failed to send delete-all request");
 				exit(1);
 			}
 			if (show_stats > 1)