Exception while running inproc

Resolver `nightly-2017-12-08`:

Program dies with no error message on the line `view $ inproc "git" ["describe"] empty` or `sh $ inproc "git" ["describe"] empty` etc.
When trying to use `inprocWithErr` I see `Left ...` but it even dies.

in `GHCI`:
```
>>> view $ inproc "git" ["describe"] empty
fatal: No names found, cannot describe anything.
*** Exception: ExitFailure 128
```

Start by reproducing the GHCI examples using `inproc` and `inprocWithErr` with `git describe`, using resolver `nightly-2017-12-08`. Read the implementation and existing tests for these entry points, then add regression coverage for the `ExitFailure 128` case. Done means the failure has a defined, testable behavior rather than terminating without a useful error.

Written by the indexing model from the issue text.