Update libguestfs-find-requires to generate ordinary lib dependencies.
    
    Note the following important comment in the updated script:
    
    <quote>
    Note this script is *ONLY* applicable to Fedora 17+ (ie. with UsrMove)
    since we now assume that /usr/lib{,64} and /lib{,64} are the same
    directory and hence that:
    
      Requires: libfoo.so.1           <=>  /usr/lib/libfoo.so.1 exists
      Requires: libfoo.so.1()(64bit)  <=>  /usr/lib64/libfoo.so.1 exists
    </quote>
    
    (cherry picked from commit fde3bcaf2a62b4389c8ebf9d3cc738ebf118aba1)