tst_qlogging: add tests for %{pid} and %{threadid}

Since those are unpredictable, there's little we can match, besides the
"0x" for the QThread pointer. For the PID, at least we can compare it to
the value from QProcess.

Change-Id: I89420306863b95c82be761baabd733a7f17eba5e
Reviewed-by: David Faure <david.faure@kdab.com>
Reviewed-by: Kai Koehne <kai.koehne@theqtcompany.com>
doc: Fix mistake in QProgressBar::orientation

Reported on qt-interest: should say "true" instead of "false".

Change-Id: Ic9d2608631679896179ae8601790847163a9224c
Reviewed-by: Martin Smith <martin.smith@digia.com>
Reviewed-by: Sze Howe Koh <szehowe.koh@gmail.com>