Log Message:
cad/ghdl: Update to 4.1.0

Changelog:
[2024-04-14] 4.1

    The mcode backend is now fully supported on Windows x64
    Coverage output has been improved for being supported by vunit.

[2024-03-06] 4.0

    For the mcode backend, elaboration of the designs is now performed before \ 
code generation. This allows some optimizations and the support of external \ 
names.
    There is a new signal dumper (using FST format) for the mcode backend.
    The GCC backend will be deprecated and the LLVM backend will be used like \ 
the mcode backend (code generation in memory). As a consequence, no backend will \ 
generate object files anymore.