gpg: Regenerate test data for test-gpg-verify-result

gpg: Regenerate test data for test-gpg-verify-result

Turns out the expired signature case was failing because the signature
itself was corrupted.  Reconstructed the test data and updated the test
code.  Note, an expired signature is still counted as valid.

Also, handy debugging trick for setting a key or signature expiry: the
CLI makes it appear the shortest expiry is 1 day, but it also secretly
recognizes "seconds=N".