Comment 3 for bug 1360203

Some additional info:
* partly relates to https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1475954
* cryptodisk is not included here: https://anonscm.debian.org/cgit/pkg-grub/grub.git/tree/debian/build-efi-images
* efi image should also include at least these modules: gcry_sha256, gcry_sha512, luks, gcry_rijndael