This bug was fixed in the package grub2-signed - 1.34.13
--------------- grub2-signed (1.34.13) trusty; urgency=medium
* Rebuild against grub-efi-amd64 2.02~beta2-9ubuntu1.11 (LP: #1591818)
-- Martin Pitt <email address hidden> Mon, 04 Jul 2016 13:15:40 +0200
This bug was fixed in the package grub2-signed - 1.34.13
---------------
grub2-signed (1.34.13) trusty; urgency=medium
* Rebuild against grub-efi-amd64 2.02~beta2- 9ubuntu1. 11 (LP: #1591818)
-- Martin Pitt <email address hidden> Mon, 04 Jul 2016 13:15:40 +0200