qt: Fix connection to readyReadStandardOutput signal
* lang/qt/src/qgpgmerefreshsmimekeysjob.h, lang/qt/src/qgpgmerefreshsmimekeysjob.cpp (QGpgMERefreshSMIMEKeysJob::slotStderr): Remove. * lang/qt/src/qgpgmerefreshsmimekeysjob.cpp (QGpgMERefreshSMIMEKeysJob::startAProcess): Handle readyReadStandardOutput and readyReadStandardError signals with lambdas.
For now output stdout and stderr of gpgsm process as debug log. In
particular, this "adds" the missing slot slotStdout.
- GnuPG-bug-id: T5951