git wont keep track of empty folders, therefore create it using the
Makefile.

The module is unsafe because it collects metadata while being
writable for files on the same system; It therefore cannot be
relied upon for security purposes. It will however allow to use
the agent for purposes of better system changes transparency where
malicious changes are not expected.

UEFI standard asks that UEFI applications are located in an
/EFI/vendor folder. We therefore place them within /EFI/Nexedi
inside the EFI System Partition.

Put our UEFI boot application just before the currently booted element in the list.