tests,w32: Fix GPGME tests requiring a pinentry.
* tests/gpgme/gpgme-defs.scm: Use our fake pinentry, and configure it to supply the correct passphrase.
Previously, the GPGME tests used the fake pinentry distributed with
GPGME which is a Bourne shell script. Use the fake pinentry from
GnuPG instead.
- Signed-off-by: Justus Winter <justus@g10code.com>