base-files: fix status display command

base-files: fix status display command

If service() is called w/o parameter then the status display for services
with multiple instances is incorrect. E.g. samba4 or wpad have 2 instances.

root@OpenWrt:~# /etc/init.d/samba4 status
running
root@OpenWrt:~# /etc/init.d/wpad status
running

Before change:
/etc/init.d/samba4                 enabled         stopped
/etc/init.d/wpad                   enabled         stopped

After change:
/etc/init.d/samba4                 enabled         running
/etc/init.d/wpad                   enabled         running

Signed-off-by: Alexander Egorenkov <egorenar-dev@posteo.net>