hdf5_ep

[svn-r10656] Purpose:
Output tweak

Description:
Test output in C++ and Fortran directories now puts "C++ API:" or
"Fortran API:" in front of the name of the test being run.
I had overlooked the line of code that caused this to happen.

Solution:
Added HDF_CXX and HDF_FORTRAN variables to C++ and Fortran Makefiles.am.

Platforms tested:
heping (minor change)