hdf5_ep

[svn-r21044] Purpose:
    Fix HDFFV-7592

    "Remove PACKEDBITS option from autotools files"

Description:
    The code for h5dump's packed bits feature was
    conditionally compiled in via this option during its
    'beta' release in 1.8.5. Now that the feature is fully
    supported, h5dump has since been changed to always
    compile the packed bits code (having removed the #ifdef
    H5_HAVE_H5DUMP_PACKED_BITS checks), so this option in
    configure is no longer needed.

    This commit removes the --enable-h5dump-packed-bits
    configure option, including the help summary from
    './configure --help' and the libhdf5.settings output
    summary, the PACKED_BITS Makefile variable, and the
    definition of H5_HAVE_H5DUMP_PACKED_BITS define in
    appropriate pubconf header files (which has already
    been removed from use in source code as of r20722).

    Note that this option was never added to the trunk,
    thus this commit only need occur on the 1.8 branch.

Tested:
    - Configure output, help, & summary verified on jam
    - h5committested