[toolset] Various fixes for running tests

* `. ~/.profile` doesn't affects current process.
* gcc-4.8 is default compiler of Ubuntu 14.04.
* weber: `mix compile` waits prompt. Test stop here.
* Some PyPy tests doesn't work because of `gunicorn -k tornado`.
We have tried a number of ways to script the installation for Elixir and Weber and both hang the installer. So we have commented them out for now and are running their installations manually for round 10.

ANY input would be great on this issue, btw.