Fix 8051 port builds to play nicely with #173
Merge branches 'pull-requests/core-net-uip-loopback', 'pull-requests/cpu-avr-avrdude-mcu', 'pull-requests/cpu-avr-bootloader', 'pull-requests/cpu-avr-rf230bb-cleanup-hooks', 'pull-requests/cpu-avr-rndis-refactor', 'pull-requests/cpu-avr-usb-cdc-serial-update', 'pull-requests/resolv-mdns-announce-alignment', 'pull-requests/platform-econotag-uip-rpl-override' and 'uip-updates', remote-tracking branches 'malvira/travis-fixes', 'g-oikonomou/bug-fixes/ipv6-default-off' and 'g-oikonomou/bug-fixes/uip-conf-ipv6' into bleeding-edge
Merge branch 'pull-requests/platform-avr-ravenusb-leds' into bleeding-edge

Conflicts:
	platform/avr-ravenusb/contiki-conf.h