admin: Fix mingw build by reordering includes
    
    By trying to lead the way of clean includes, I sorted the lines
    alphabetically and that is a problem for mingw builds with gnulib.
    As 'configmake.h' defines DATADIR and 'datatypes.h' transitively
    includes 'winsock.h' that uses 'DATADIR' as a name for a struct,
    it's enough to reorder those.
    
    Even though this might be worked around in gnulib later on, this
    fixes the build for now.
    
    Signed-off-by: Martin Kletzander <mkletzan@redhat.com>