This bug was fixed in the package grub2-signed - 1.34.14
--------------- grub2-signed (1.34.14) trusty; urgency=medium
* Rebuild against grub-efi-amd64 2.02~beta2-9ubuntu1.12 (LP: #1456911)
-- Adam Conrad <email address hidden> Tue, 02 Aug 2016 00:57:04 -0600
This bug was fixed in the package grub2-signed - 1.34.14
---------------
grub2-signed (1.34.14) trusty; urgency=medium
* Rebuild against grub-efi-amd64 2.02~beta2- 9ubuntu1. 12 (LP: #1456911)
-- Adam Conrad <email address hidden> Tue, 02 Aug 2016 00:57:04 -0600