fwupd-signed is only a virtual package, and it's reported
as missing via package_errors.log file. So instead let's
install the corresponding package for each architecture explicitly.
# firmware updates
fwupd
-fwupd-signed
policykit-1
udisks2
linux-image-686
linux-cpupower
+# firmware updates
+fwupd-i386-signed
+
PACKAGES install AMD64
linux-image-amd64
linux-cpupower
# EFI PXE boot support in grml-terminalserver
grub-efi-amd64-signed
shim-signed
+
+# firmware updates
+fwupd-amd64-signed