Fix FTBFS due to link failure of libfontmanager.so
    
    A recent change in redhat-rpm-config makes the
    hardened builds link with -Wl,-z,defs.
    
    See RHBZ#1535422 for the bug which introduced this
    change in redhat-rpm-config.
    
    That change, in turn, provokes a build failure due
    to a missing lib not being listed when linking
    libfontmanager.so.
    
    Resolves RHBZ#1538767