john-jumbo 1.8.0-j1

Version bump. Changed how we handle this, to reflect upstream’s new release priorities and move to autotools. Removed a redundant part of the patch.
Bleh. Can't get it to work. Looks like the whole ` prefix ` thing might still be a work in [progress](https://github.com/magnumripper/JohnTheRipper/issues/612).