tests: Add test importing a revocation certificate.
* tests/openpgp/Makefile.am (XTESTS): Add new test. * tests/openpgp/import-revocation-certificate.scm: New file. * tests/openpgp/samplemsgs/revoke-2D727CC768697734.asc: Likewise.
- Signed-off-by: Justus Winter <justus@g10code.com>