Qt.core: Let the qch rule take all qdoc output as auxiliary inputs
Qt.core: Let the qch rule take all qdoc output as auxiliary inputs

This allows to provide additional content not directly produced by qdoc.

Change-Id: I15fc1a315d1e568ea99491c19a13d86f43e5da8d
Reviewed-by: Jake Petroules <2d627e1cecd5435752fa500bacbe05f7cc90c369@qt.io>

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