Add armhfp for the existing aarch64 image builds
As part of the UEFI on ARMv7 feature we build the images the same
as aarch64 using image factory. This is initiall enabling the
Minimal/Server/Workstation images to allow wider testing. Once we
know they're good we'll move all the others over and remove the old
build mechanism that uses appliance-creator.
Signed-off-by: Peter Robinson <pbrobinson@fedoraproject.org>