libcbor: ensure that MSYS2's `make.exe` is used
libcbor: ensure that MSYS2's `make.exe` is used

In GitHub workflows, it looks as if Strawberry Perl's `gmake.exe` is
preferred...

Signed-off-by: Johannes Schindelin <53fb8db7833fca1e1746dd8592f61048d350f64c@gmx.de>

dscho/MSYS2-packages,git-for-windows/MSYS2-packages,dscho/MSYS2-packages,git-for-windows/MSYS2-packages,dscho/MSYS2-packages,git-for-windows/MSYS2-packages,git-for-windows/MSYS2-packages,dscho/MSYS2-packages