Add minimal passthrough mode to `redex.py`
Add minimal passthrough mode to `redex.py`

Summary: Support `--outdir` and `--dex-files` in `redex.py` and special-case the computation. This has the benefit of getting special crash handling (e.g., symbolication).

Reviewed By: minjang

Differential Revision: D29714154

fbshipit-source-id: 158bded51f0828d965d8658078076f9824bff75e

facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex