gpgscm,tests: Add new functions to the test environment.
* tests/gpgscm/lib.scm (first, last, powerset): New functions. * tests/gpgscm/tests.scm (interactive-shell): New function. * tests/openpgp/Makefile.am (EXTRA_DIST): Add new file. * tests/openpgp/README: Document 'interactive-shell'. * tests/openpgp/shell.scm: New file.
- Signed-off-by: Justus Winter <justus@g10code.com>