tests: Move common functionality.
* tests/openpgp/defs.scm (with-home-directory, with-ephemeral-home-directory): Move... * tests/gpgscm/gnupg.scm: ... to this new file. * tests/gpgscm/main.c (main): Load the new file.
- Signed-off-by: Justus Winter <justus@g10code.com>