tests: Run each test in a clean environment.
* tests/openpgp/Makefile.am (TESTS_ENVIRONMENT): Drop obsolete variables, add 'srcdir', use absolute paths. (TESTS): Rename to 'XTESTS' to avoid emitting the automake test runner. Drop 'setup.scm' and 'finish.scm'. (xcheck): New target that runs 'run-tests.scm', our Scheme test suite runner. It will run each test in a clean environment, isolated from the other tests. (EXTRA_DIST): Adapt accordingly. * tests/openpgp/README: Likewise.
- Signed-off-by: Justus Winter <justus@g10code.com>