Updated gcc-arm-embedded to version 4.8-2014q1

Now it builds, after a bit of patching, but it still doesn't install properly
Use formulae for gcc-arm-embedded dependencies

Instead of relying on the build-prerequisites.sh script provided with the source. The provided script builds the same versions, but mangles the installation.
More fixes for gcc-arm-embedded

This version runs to completion and properly installs itself