This does 'bleed' the metadata contents into areas previously covered by quirks,
but in this case may be pragmatic and more up to date than a build-time
generated quirk file, which increases the user-friendliness of fwupdmgr.
The fwupd UEFI plugin refuses to start if bit 3 of the "BIOS Characteristics
Extension Byte 2" (13h) is cleared. Bit 3 is UEFI Specification is supported.
Also, double-check that /sys/firmware/efi does not exist before disabling the
plugin as other machines may be affected too. The quirk then acts to supress
the console warning about the broken SMBIOS value.
Fixes https://github.com/fwupd/fwupd/issues/1342
Some system firmware helpfully 'deduplicate' the boot loader entries based on
the filepath, without taking into account either the label or optional data.
This means we have to use a custom copy of shim for firmware updates.
