fix examples/code-generator
fix examples/code-generator

This example did nothing since commit c91dcd35.

Change-Id: I7aa440272b2499e26bc947e9b973682a82ca2b75
Reviewed-by: Jake Petroules <2d627e1cecd5435752fa500bacbe05f7cc90c369@theqtcompany.com>

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