Autotests: Ensure that waitForNewTimestamp() always terminates
Autotests: Ensure that waitForNewTimestamp() always terminates

Apparently, the abovementioned function has been observed to run
seemingly forever in certain environments. Fix that by no longer
requiring an actual file timestamp change for it to terminate.

Task-number: QBS-1169
Change-Id: I9798309d179b0b6f8857ca8a4a5c1236ca162c27
Reviewed-by: Joerg Bornemann <47777b9406dbddd02a3fdca8341789a013805a11@qt.io>

qtproject/qt-labs-qbs,qt-labs/qbs,qtproject/qt-labs-qbs,qt-labs/qbs,qt-labs/qbs,qtproject/qt-labs-qbs,qt-labs/qbs,qtproject/qt-labs-qbs,qtproject/qt-labs-qbs,qt-labs/qbs,qt-labs/qbs,qtproject/qt-labs-qbs,qtproject/qt-labs-qbs,qt-labs/qbs