Fix perl-threads dependency on the interpreter API
    
    There was an one-line mistake in the following comit. The dependency
    on perl's name-version without release number could never been
    satisfied.
    
    commit fde8b38ed30b76cc7122be327ff2e288138f7c53
    Author: Marcela Mašláňová <mmaslano@redhat.com>
    Date:   Mon Aug 13 14:05:08 2012 +0200
    
        Define perl_compat by macro for rebuilds.
    
        Sub-packages depend on compat rather than on nvr.