[Oberon] NAstrobe for RISC5 on Pepino

[Andreas Pirklbauer]

   > * The code space used by modules can be freed if no application is still referencing them


Except that FPGA Oberon does NOT actually check whether such references exist - i.e. it *always* unloads the specified modules, no matter whether other modules reference them or not.


This is, in my view, one of the things that is badly missing - even though the implementation cost is less than 100 lines of code.