Summary of our changes on top of Fedora's grub.macros:
======================================================

- armv7:
  o build efi too on armv7
  o don't set arm as EFI only
  o we want --platform=uboot
  o Define legacy_target_cpu_name on arm
- we want grub2-efi on i586 (added to efi_arch + with_efi_modules=1)
- comment alt_efi_arch on x86_64 so that we do not build /usr/lib/grub/i386-efi
- fix Fedora-shism hardcoded in gnulib
- fix "package_arch" to match Mga packaging
- we don't want /boot/grub2/themes/system
- we merge missing translations for gfx menu (%merge_theme_translations)
- we use -Os so core.img fits in MBR 63 sector gap (mga#26778)
- epoch is not set in Mageis's grub
- we don't want BLS patches
- we support booting on UEFI w/o SecureBoot
- cosmetics:
  o we keep Group tag
  o fix summary-ended-with-dot
