hdf5_ep

[svn-r20475] Purpose:

    - Revise shared Fortran library disabling scenarios in configure
    - Improve configure output summary

Description:

    Shared Fortran libraries are not supported on Mac, but were being
    disabled by configure in a way that also forced the C libraries
    to be static-only. This has been fixed, so now only shared Fortran
    is disabled while shared C can remain.

    This prompted two additional changes:

        1. While working on the check that addresses whether or not
           shared Fortran libraries are allowed, removed old and no
           longer needed check(s) that disable shared Fortran
           libraries with HP, Intel 8, PGI, and Absoft compilers.
           (Essentially, Mac is the only situation in which Fortran
           shared are disabled by configure.)

        2. Having two different states of libraries (i.e. shared C
           library with static-only Fortran library) was not apparent
           in the configure summary, which labeled all libraries as
           either shared and/or static. I've added lines to both the
           C++ and Fortran output sections to list shared/static-ness
           of these libraries specifically.

    Additionally, I've made sure that the new --enable-unsupported
    configure option correctly overrides configure if it tries to
    disable a shared library.

Tested:

    jam, fred, & h5committest