Fix systemd-boot installed systems.
    
    Fedora has a inst.sdboot option which installs kernels on the
    ESP, it also provides a grubby shim for compatibility with
    parts of the system wishing to have assistance in reading and
    updating loader entries. This means that akmods tries to use
    it and fails because it doesn't support the --default-kernel
    switch. Adding that switch to the systemd/grubby shim results
    in a path that looks like /boot/efi/XXXX/A.B.C-D00.fcXX.arch/linux
    rather than the pattern akmods is using to detect the default kernel
    entry. Meaning it needs to be tweaked to understand this anyway.
    
    Instead, lets just fix akmods to understand the grubby symlink
    and fix it to work with the existing bootctl logic. In this case
    that involves telling jq to output "raw" unquoted strings so
    that the rest of akmods is happy.
    
    Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>