WIP: build changes for ARM

(cc: @ViralBShah) This currently compiles but does not bootstrap due to jl_cpuid. I was able to stub that out before, but I think it is more deeply entangled now.

See `Makefile.user.fake` for other options used.

- note `DYNAMIC_ARCH=0`
- edit `openblas-.../c_check.c` and remove the `-m32` compiler option, as this appears to be unsupported by the arm GCC build (at least with Ubuntu 12.04. there are some suggestions to install `g++-4.8.1-multilib`, but that did not help me)

See [here](https://gist.github.com/ihnorton/0d475ddda80a3d82c982) for all of the packages I have installed.