hdf5_ep

[svn-r9952] Purpose:
Bug fix

Description:
Typo in /hl/fortran/src Makefile.am caused obtuse compiler complaints from
some compilers (but not others).
Errors were of the form:
gcc: cannot specify -o with -c or -S and multiple compilations

Solution:
In AM_CLFAGS, missed -I before ../../hl/src.  This made gcc think that we
also wanted to compile /hl/src directory.  Fixed error by adding -I.

Platforms tested:
verbena, eirene.