hdf5_msb

[svn-r9691] Description:
mpich 1.2.6 does not like the tweaking of using -O2 flag.
Comment out the Tweaking since it caused problems to mpich1.2.6.
Need to investigate the reasons and effects to tweak.


Platforms tested:
Tested in heping using mpich 1.2.6 and in eirene uisng mpich 1.2.6.