Rebase Fedora 16 to new stable libguestfs version 1.14.2.
    
    This was discussed upstream and announced on Fedora devel list.
    https://www.redhat.com/archives/libguestfs/2011-October/msg00004.html
    https://lists.fedoraproject.org/pipermail/devel/2011-November/159316.html
    This spec file is based on current Rawhide (which on development
    version 1.15.4).