Remove executable bit from fonts
    
    The executable bit on the fonts causes Lintian checks to fail
    while working on a Debian package for Ipsilon.
    
    Signed-off-by: Marlin Cremers <m.cremers@cvo-technologies.com>
    Reviewed-by: Pierre-Yves Chibon <pingou@pingoured.fr>
    Reviewed-by: Patrick Uiterwijk <puiterwijk@redhat.com>