hdf5_msb

[svn-r13204] Purpose:
Improvement.

Description:
Added the forcemode option. (was in hdf4 for months.)
auto-configure have changed the ac_try syntax from 'eval $ac_try' to
'eval "$ac_try"'.  Add a new global-substitute to support that too.

Platforms Tested:
Kagiso only since it is just a shell script simple change.