Let's try building the Fedora shim without any changes
    
    This is a short term solution.  We use shim blobs from bootstrap:master
    directly and we don't rebuild anything.  We cannot provide the signed
    binaries because they're only available in shim-0.8, which cannot be
    rebuilt anymore and even if it could, we couldn't sign it anyway.
    
    In the long term 0.8 shouldn't be needed and shim:master should provide
    the signed modern blobs.
    
    Fedora 27 only.
    
    Signed-off-by: Petr Šabata <contyk@redhat.com>