aspino: fix build

Aspino patched `libglucose` for their own uses, however they currently
depend on glucose v4.0.
(see https://github.com/alviano/aspino/tree/e31c3b4e5791a454e6602439cb26bd98d23c4e78/patches)

The patches don't apply properly on `glucose-4.1` anymore, furthermore
the new source directory caused the `bootstrap.sh` from `aspino` which
was supposed to apply the patches and recompile the setup to break.

Furthermore some minor changes to the derivation were introduced:

- upgraded from `2016-01-31` to `2017-03-09`
- the name contains an `-unstable-` infix as upstream has no releases
- instead of a `patchPhase` the `postPatch` hook will be used for
  `substituteInPlace` to keep advanced patching features from `nixpkgs`
  available.
- `patchShebangs` will be called to avoid impurities because of the
  implicit reliance on `/bin/sh`
- added myself as second maintainer to have more people available in
  case of any further breackage

See https://hydra.nixos.org/build/70688471/log
See ticket #36453