Those tests are taken from https://github.com/apenwarr/redo.

* Only basic ([01]*) tests taken, because other ones are too apenwarr
  implementation specific.
* 140-shuffle and 141-keep-going removed, because apenwarr specific
* flush-cache removed, as it works directly with apenwarr's database
* redo/sh and redo/py targets replaced with /bin/sh and ${PYTHON}
* skip-if-minimal-do.sh removed
* 010-jobserver/parallel* removed, because goredo intentionally does not
  parallelize targets building through plain redo invocation for human
  convenience
* one of 105-sympath tests commented out, because its symlink path can
  not be resolved even at OS level