Add a way to collect bug report data easily

[LegNeato]

Right now when people filed bug reports, it's hard to know what is going on on the host side, how they are building the GPU code, if they are translating through naga, if vulkansdk is installed, what device they are targeting, the SPIR-V that is generated, etc.

We should have a simple way for users to dump all the data we need to debug which can be attached to a bug report or a gist. It can later be exposed in cargo-gpu

I'm not sure if rustc has something like this or we will have to create our own.