bug#23561: epg tests are (almost) always skipped

[Noam Postavsky]

Glenn Morris <rgm@gnu.org> writes:

> Thanks. Works for me on RHEL 7.2, but on hydra the tests are still skipped.
>
>>From previous investigation, they have a "gpg2" binary that is 2.0.27
> and a "gpg" one that is 1.4 (?). We can see that package-test-signed is
> not skipped. See eg
>
> http://hydra.nixos.org/build/36146533/log/raw
> http://hydra.nixos.org/build/36146533

I recently tried to fix this again [1: 1222ff5275], but it didn't work.
However, I see that package-test-signed is also skipped[2].  Does that
mean gpg isn't installed at all anymore?

[1: 1222ff5275]: 2018-07-12 21:45:30 -0400
  Don't skip epg-tests even with gpg 2.0 (Bug#23561)
  
https://git.savannah.gnu.org/cgit/emacs.git/commit/?id=1222ff5275e61e797d388489b8a88f499247321d

[2]: 
https://nix-cache.s3.amazonaws.com/log/pxd5kq55rryri9qncacw66qlbj6nj0q1-emacs-coverage-unknown.drv