Bug#906596: grub2: secure boot source templates build same source on different architectures

[Ansgar Burchardt]

Package: src:grub2
Version: 2.02+dfsg1-5
Severity: important

The source template in grub-efi-amd64-signed-template _amd64.deb and
_i386.deb builds the same source package: grub-efi-amd64-signed.
That is not possible.

Same for the ia32 version.

I suggest to only build the signed version for the native architecture
(i.e. grub-efi-amd64-signed only on amd64).  People should still be
able to install the other version via multi-arch if required (though I
guess most people will use amd64 and x86_64 EFI).

The binary package description in the source template is also wrong:

+---
| Package: grub-efi-amd64-signed
| Architecture: i386
| Description: GRand Unified Bootloader, version 2 (i386 UEFI signed by Debian)
+---

as it talks about `i386 UEFI` for grub-efi-amd64-signed.

Ansgar