defaults: Add patterns for shim/grub2 on riscv64

[andreabolognani]

A recent commit changed the way these are looked up and accidentally broke image building on riscv64, with

KiwiBootLoaderGrubSecureBootError: Signed grub2 efi loader not found

now being raised for kiwi recipes that worked just fine before that moment.

Fixes: 1975723

Note: this currently breaks the test suite, and I couldn't figure out how to make that issue go away. Guidance on the matter would be very welcome.

[andreabolognani]

Fixed a spot where I had failed to add the riscv64 pattern. Thanks, David!

Still getting the following failures which I'm not sure what to do about:

=== short test summary info ===
FAILED bootloader/config/grub2_test.py::TestBootLoaderConfigGrub2::test_setup_disk_boot_images_bios_plus_efi_secure_boot_no_shim_install - IndexError: pop from empty list
FAILED bootloader/config/grub2_test.py::TestBootLoaderConfigGrub2::test_setup_disk_boot_images_bios_plus_efi_secure_boot_no_shim_at_all - IndexError: pop from empty list
FAILED bootloader/config/grub2_test.py::TestBootLoaderConfigGrub2::test_setup_install_boot_images_efi_secure_boot - IndexError: pop from empty list
=== 3 failed, 1788 passed in 76.93s (0:01:16) ===

[schaefi]

Thanks great catch and sorry I overlooked to update this architecture correctly.

The tests are a beast. If you are ok I'll fix the unit tests to pass with your code change ?

[andreabolognani]

@schaefi by all means go ahead :)

[schaefi]

@schaefi by all means go ahead :)

@andreabolognani done :) Let's wait for the tests to pass. Once done, can you squash the commits into one as you see fit and then we can merge.

Thanks much

[andreabolognani]

@schaefi excellent, thank you!