updated for non-x86 builds

Someone in IRC couldn't build your layer, so I pulled them into my RPi layer and got them building and running on RaspberryPi (and the IRC user verified they worked on his machine too).  I had to go back to something more like the older erlang recipes, plus add a work-around for the native configure "bootstrap" failure (and no, the conventional recommendation of INSANE_SKIP does *not* work, at least not as of a couple of weeks ago on poky master).  So feel free to take these or not, but please let me know if you have any changes I can test in a full armv6 hardfloat build.