Update Travis netCDF package.
Update Travis netCDF package.

This new one is statically linked to hdf5, linking against the
(incompatible) version on Travis' Ubuntu 12.04 images.

Unidata/netcdf-java,Unidata/netcdf-java,Unidata/netcdf-java,Unidata/netcdf-java,Unidata/netcdf-java,Unidata/netcdf-java,Unidata/netcdf-java