compel: plugins,std -- Use sys_recvfrom instead of recv

prologue.h defines sys_recv() macro - let's use it by now
Signed-off-by: Dmitry Safonov <dsafonov@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>

compel/plugins/std/std.c

@@ -40,7 +40,7 @@ static int fini_socket(void)
 	if (ret)
 		goto err;
 
-	ret = sys_recvfrom(ctl_socket, buf, sizeof(buf), MSG_WAITALL, 0, 0);
+	ret = sys_recv(ctl_socket, buf, sizeof(buf), MSG_WAITALL);
 	if (ret)
 		goto err;
 err: