Add 32bit images to build matrix
Add 32bit images to build matrix

in order to catch problems like this again:
https://github.com/hpi-swa/smalltalkCI/issues/525
hpi-swa/filetreeCI,fniephaus/filetreeCI,hpi-swa/filetreeCI,fniephaus/filetreeCI,hpi-swa/filetreeCI,hpi-swa/smalltalkCI,hpi-swa/smalltalkCI,fniephaus/filetreeCI