hdf5_ep

[svn-r3807] Purpose:
    Portability changes
Description:
    Very quick port to Compaq (nee DEC) Alpha OSF5.
Solution:
    Added a new "dec-osf5.x" configuration file and changed configure.in
    to look for it.
    The local test machine is now passing all the tests, except I can't get
    the "-L<path>" stuff to work, so tools which depend on the HDF4 library
    around tested.
Platforms tested:
    Compaq Alpha 5.1 (compaq.ncsa.uiuc.edu)