app-arch/zoo: new EAPI=6 revision to fix two bugs.

app-arch/zoo: new EAPI=6 revision to fix two bugs.

This new revision updates to EAPI=6 and switches our upstream to
Debian. Doing so obsoletes most of our custom patches, and fixes the
build with -Werror=format-security.

The LICENSE variable has also been updated to "public-domain", since
the author released it as such to Debian in an email. That means the
"zoo" license will soon be unused.

Two things may come back to bite me:

  * I omitted the "gcc fixes" patch, because there is no indication
    of what it's supposed to fix. The thing builds fine here.

  * I switched the "make" command back to "emake", because that's how
    it should be. If it still causes problems with BSD systems, I
    guess we can put it back.

The program is still announcing that it's copyrighted, but that will
have to be patched out.

Gentoo-Bug: 520476
Gentoo-Bug: 614674

Package-Manager: Portage-2.3.3, Repoman-2.3.1