Generating diffs for incremental benchmarks

[vesalvojdani]

In order to create a large-scale incremental benchmarking suite, it would be useful to automate the diff generation process.

• Find some mutation testing tool that allows easy creation of mutants
• Make these mutations in the forms of diffs that we can use in our benchmarking scripts.
• Create a sensible set of diffs for our test programs.

It would be important to check if the tool works on our test program, including linux device drivers, before committing to it.