Build of arptables with android toolchain

# [tuscan]
# Server = file:///var/cache/pacman/pkg/

# :: Synchronizing package databases...
# downloading tuscan.db...

# /toolchain_root/arm-linux-androideabi --> /sysroot/arm-linux-androideabi
# /toolchain_root/COPYING3.LIB --> /sysroot/COPYING3.LIB
# /toolchain_root/sysroot --> /sysroot/sysroot
# /toolchain_root/COPYING.RUNTIME --> /sysroot/COPYING.RUNTIME
# /toolchain_root/lib --> /sysroot/lib
# /toolchain_root/SOURCES --> /sysroot/SOURCES
# /toolchain_root/lib64 --> /sysroot/lib64
# /toolchain_root/share --> /sysroot/share
# /toolchain_root/bin --> /sysroot/bin
# /toolchain_root/COPYING --> /sysroot/COPYING
# /toolchain_root/COPYING3 --> /sysroot/COPYING3
# /toolchain_root/COPYING.LIB --> /sysroot/COPYING.LIB
# /toolchain_root/include --> /sysroot/include
# /toolchain_root/libexec --> /sysroot/libexec

# ==> Making package: arptables 0.0.4-3 (Tue Apr 4 20:56:36 UTC 2017)
# ==> Checking runtime dependencies...
# ==> Checking buildtime dependencies...
# ==> WARNING: Using existing $srcdir/ tree
# ==> Starting build()...
# arm-linux-androideabi-gcc -O2 -Wall -Wunused -I.//include/ -Iinclude/ -DARPTABLES_VERSION=\"0.0.4\" -c -o arptables-standalone.o arptables-standalone.c
# arm-linux-androideabi-gcc -O2 -Wall -Wunused -I.//include/ -Iinclude/ -DARPTABLES_VERSION=\"0.0.4\" -c -o arptables.o arptables.c
# arm-linux-androideabi-gcc -O2 -Wall -Wunused -I.//include/ -Iinclude/ -DARPTABLES_VERSION=\"0.0.4\" -c -o libarptc/libarptc.o libarptc/libarptc.c
# arm-linux-androideabi-gcc -O2 -Wall -Wunused -I.//include/ -Iinclude/ -DARPTABLES_VERSION=\"0.0.4\" -c -o extensions/arpt_standard.o extensions/arpt_standard.c
# libarptc/libarptc.c:27:22: error: conflicting types for 'socklen_t'
# typedef unsigned int socklen_t;
# ^
# In file included from /sysroot/sysroot/usr/include/strings.h:42:0,
# from /sysroot/sysroot/usr/include/stdlib.h:36,
# from libarptc/libarptc.c:17:
# /sysroot/sysroot/usr/include/sys/types.h:127:21: note: previous declaration of 'socklen_t' was here
# typedef __socklen_t socklen_t;
# ^
# arptables.c:251:32: error: 'ETH_ALEN' undeclared here (not in a function)
# unsigned char mac_type_unicast[ETH_ALEN] = {0,0,0,0,0,0};
# ^
# arptables.c: In function 'getmac_and_mask':
# arptables.c:299:3: warning: implicit declaration of function 'ether_aton' [-Wimplicit-function-declaration]
# if (!(addr = ether_aton(p + 1)))
# ^
# arptables.c:299:14: warning: assignment makes pointer from integer without a cast [enabled by default]
# if (!(addr = ether_aton(p + 1)))
# ^
# arptables.c:304:13: warning: assignment makes pointer from integer without a cast [enabled by default]
# if (!(addr = ether_aton(from)))
# ^
# arptables.c: In function 'get16_and_mask':
# arptables.c:342:3: warning: implicit declaration of function 'htons' [-Wimplicit-function-declaration]
# *mask = htons((uint16_t)i);
# ^
# arptables.c: In function 'network_to_addr':
# arptables.c:424:3: warning: implicit declaration of function 'htonl' [-Wimplicit-function-declaration]
# addr.s_addr = htonl((unsigned long) net->n_net);
# ^
# arptables.c: In function 'addr_to_network':
# arptables.c:894:2: warning: implicit declaration of function 'ntohl' [-Wimplicit-function-declaration]
# if ((net = getnetbyaddr((long) ntohl(addr->s_addr), AF_INET)) != NULL)
# ^
# arptables.c: In function 'print_firewall':
# arptables.c:1324:3: warning: implicit declaration of function 'ntohs' [-Wimplicit-function-declaration]
# int tmp = ntohs(fw->arp.arpop);
# ^
# libarptc/libarptc.c: In function 'dump_entry':
# libarptc/libarptc.c:125:9: warning: implicit declaration of function 'ntohl' [-Wimplicit-function-declaration]
# IP_PARTS(e->arp.src.s_addr),IP_PARTS(e->arp.smsk.s_addr));
# ^
# make: *** [Makefile:31: libarptc/libarptc.o] Error 1
# make: *** Waiting for unfinished jobs....
# make: *** [Makefile:25: arptables.o] Error 1
# ==> ERROR: A failure occurred in build().
# Aborting...