Port our randomization code into Clang and "wire it up"

[connorkuehl]

In this commit (4ff065b) we have a quick hacky test to see if we can get fields shuffled in the compiler.

We need to port our basic randomization and our performance sensitive randomization code.

Original code lives in this repository: https://github.com/connorkuehl/clang_randstruct