Tools: hv: check return value of daemon to fix compiler warning.

hv_kvp_daemon.c: In function 'main':
hv_kvp_daemon.c:1441:8: warning: ignoring return value of 'daemon', declared with attribute warn_unused_result [-Wunused-result]
Signed-off-by: NOlaf Hering <olaf@aepfle.de>
Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

tools/hv/hv_kvp_daemon.c

@@ -1439,7 +1439,8 @@ int main(void)
 	char *kvp_recv_buffer;
 	size_t kvp_recv_buffer_len;
 
-	daemon(1, 0);
+	if (daemon(1, 0))
+		return 1;
 	openlog("KVP", 0, LOG_USER);
 	syslog(LOG_INFO, "KVP starting; pid is:%d", getpid());