Buildroot 2013.11

Hi davilla,

This branch updates buildroot for XIOS devices to the 2013.11 release.  I have only tested it on an M3 but I have attempted port the changes to the M1 when necessary.  This branch also includes a number of small fixes that were required in order to make it possible for me to build your repository on my machine (e.g. fixes for autopoint and libusb-config).

I have been using a build from this branch on my own device without any problems for the last few days but there are a number of features which I have not tested because I have no need for them (the two which immediately spring to mind are QT and wpa_supplicant).

The dgburr:buildroot-2013.11 branch contains what I consider to be the bare minimum changes required to use the updated version of buildroot.  I have been experimenting with some other updates in the dgburr:master branch (e.g. updating XBMC to 12.3 Frodo) that might be useful to push upstream in the future.