When I build a .so module in Alpine OS, I found that always some symbol not found caused compile fail. But it's normal in other platform(centOS, ubuntu).

```
12158:20180913:074631.818 In zbx_load_modules()
12158:20180913:074631.818 loading module "/home/zabbix/src/modules/zabbix_module_docker/zabbix_module_docker.so"...