tests: Improve portability of fake-pinentry.
* tests/openpgp/fake-pinentry.c: Make all functions static. (get_passphrase): s/unlink/remove/ because that is standard C. (spacep): Rename to whitespace and change all callers. (main): Move macro out of if-then chain.
- Signed-off-by: Werner Koch <wk@gnupg.org>