Fixed compliation on Android: - int128: fmodl(long double) doesn't exist on Android (suggested by Ingmar Baumgart)
DHCP bugfix: break was missed
omnet5 related fixes: getLastModuleId() --> getLastComponentId()
TCP_NSC/TCP_LWIP: icon was missed in ned files
register class IPv4Datagram
backported dhcp module tests
ICMP test: fixed EV textout check