trivial: Add back pesign to the fwupd docker images
trivial: Add back pesign to the fwupd docker images

This is needed as fwupd-efi uses the fwupd images, and pesign is a
build-time dep of the Fedora package.

fwupd/fwupd,fwupd/fwupd,fwupd/fwupd,hughsie/fwupd,hughsie/fwupd,fwupd/fwupd,hughsie/fwupd,hughsie/fwupd