Nslookup ipv6 in lede 17.01.1 (fix: update busybox to 1.25.1-4)

Hopefully this helps.

Reading symbols from ./staging_dir/target-arm_cortex-a15+neon-vfpv4_musl-1.1.16_eabi/root-ipq806x/bin/busybox...done.
0xb6fdd770 in _dlstart ()
   from /OwrtLEDE/r7800-1701/scripts/../staging_dir/target-arm_cortex-a15+neon-vfpv4_musl-1.1.16_eabi/root-ipq806x/lib/ld-musl-armhf.so.1
(gdb) c
Continuing.

Program received signal SIGILL, Illegal instruction.
free (p=0xbefffede) at src/malloc/malloc.c:465
465			if (extra & 1) a_crash();
(gdb) bt
#0  free (p=0xbefffede) at src/malloc/malloc.c:465
#1  0x0005ca54 in llist_pop (head=head@entry=0xbefffccc) at libbb/llist.c:44
#2  0x0002035c in nslookup_main (argc=argc@entry=4, argv=argv@entry=0xbefffdd4)
    at networking/nslookup_lede.c:744
#3  0x00017330 in run_applet_no_and_exit (applet_no=64, argv=0xbefffdd4, 
    argv@entry=0x4) at libbb/appletlib.c:879
#4  0x000173d8 in run_applet_and_exit (argv=0x4, 
    name=0x40 <error: Cannot access memory at address 0x40>)
    at libbb/appletlib.c:893
#5  main (argc=<optimized out>, argv=0x4) at libbb/appletlib.c:971
(gdb) thread apply all bt full