Bootstraping the Rust compiler

I made an article about some of my GSoC work on `rustc_codegen_gcc` - a GCC-based Rust compiler backend.

In this article, I bootstrap(build) the Rust compiler using GCC, and explain the bugs I fixed along the way.

One of the end goals of the project is better Rust support across platforms - I am currently slowly working towards bootstraping the Rust compiler on an architecture not supported by LLVM!

If you have any questions, feel free to ask me here :).