can't handle typescript compiler

[msridhar]

I added the TypeScript compiler benchmark as tests/octane/typescript.js, but Jalangi crashes during record. Unfortunately, the benchmark has several functions that shadow the arguments array, exposing known issue #21. I've added a unit test tests/unit/shadow-arguments.js reduced from the compiler. Opening this issue in case other problems arise.

[msridhar]

Re-opening as we still can't handle record / replay. Now, recording doesn't seem to terminate in a reasonable amount of time. I let the record phase run for 5 minutes, and memory usage grew to 900MB before I killed it. Without instrumentation, the program runs in < 2s on my machine. I suspect a bug somewhere; it's hard to reduce, but I'll try.