I had created a new user called _lldpd.
I tried to add it into root group.

Present root group state is as below.

uid=0(root) gid=0(root) groups=0(root),1004(input),1007(log),1011(adb),101 5(sdcard_rw),1028(sdcard_r),3001(net_bt_admin),300 2(net_bt),3003(inet),3006(net_bw_stats) context=u:r:shell:s0

I had modified some place in ASOP.
Below is what I had modified.

1. android_filesystem_config.h:
#define AID_LLDPD 146

{ "_lldpd", AID_LLDPD, },

2.adb_main.cpp:
gid_t groups[] = { AID_ADB, AID_LOG, AID_INPUT, AID_INET, AID_LLDPD, AID_NET_BT,
AID_NET_BT_ADMIN, AID_SDCARD_R, AID_SDCARD_RW,
AID_NET_BW_STATS };

3.platform.xml:
<permission name="android.permission.LLDPD" >
<group gid="_lldpd" />
</permission>


After all there modifications had done the new image still not put _lldpd to root groups.
How can I add _lldpd to root groups?