hdf5_ep

[svn-r6915] 
Purpose: bug fix for Tru64 and test of the latest szip library.

Description: h5diff uses basename function that also is defined
             in the system string.h file. That caused compilation to
             fail.

Solution:  renamed basename to h5diff_basename

Platforms tested: verbena, arabica, arabica-64,
                  and PSC Compaq machine.

Misc. update: