docker: Update images to Qbs 1.18.2
docker: Update images to Qbs 1.18.2

Qbs 1.21.0 will removes the "product" variable in the Export items after
it was deprecated in Qbs 1.18.
So in order to build Qbs with Qbs, the installed Qbs version must be
updated.

Change-Id: Ibee0676823e41defc5d613e486be0a230c431905
Reviewed-by: Ivan Komissarov <96f14e4d07227e958f51f7d2898113639e9498d9@gmail.com>

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