[Oberon] Addendum: current A2

[Treutwein Bernhard]

after using the instructions for cloning the current repo (as noted in
https://en.wikibooks.org/wiki/Oberon/A2), on yet another Q4OS, I was 
able to start UnixAos from the main directory of the cloned repo with 
Linux64/a2.sh but although A2 starts apparently, it freezes when I try
to resize the file manager ... 
Interestingly this does not happen, when I use wine to start WinAOS.

Then there is a Build.Tool in the source directory, which I used also in
2015 and before to create the ISO images. The main build process 
Finishes correctly now, i.e. I am able to compile all source modules 
it archives everything in the zip files (there was since 2016 a very obscure 
error message when creating OberonSrc.zip). But the attempt to 
link the boot files (Step 2 in Build.Tool) fails and therefore I am still 
not able to create a ISO from the current svn repo.