Try to avoid making the netCDF-4.2 documentation

It seems that there may be a bug in creating the documentation of
netCDF-4.2 that has to do with LaTex.  You may see this error:

netcdf-f90.texi:2085: warning: @item missing argument
netcdf-f90.texi:6982: raising the section level of @unnumberedsubsec which is too low
make[3]: *** [netcdf-f90.info] Error 1
make[3]: Leaving directory `/mnt/as/tmp/all/bmy/GEOS-Chem-Libraries/src/netcdf-fortran-4.2/man4'
make[2]: *** [install-recursive] Error 1
make[2]: Leaving directory `/mnt/as/tmp/all/bmy/GEOS-Chem-Libraries/src/netcdf-fortran-4.2'
make[1]: *** [nc4] Error 2
make[1]: Leaving directory `/mnt/as/tmp/all/bmy/GEOS-Chem-Libraries/src'

But as long as the libnetcdff.a file is created in the $PREFIX/lib
directory, then the installation is successful.  We are looking into
this.

Signed-off-by: Bob Yantosca <yantosca@seas.harvard.edu>