hdf5_ep

[svn-r8207] Purpose:
Bug fix, sort of.


Description:
Some compilers, e.g., intel compiler, would take a long time
to compiler H5detect.c if optimization is on.


Solution:
Setup special make rules for H5detect to be compiled always with
optimization off by using -g.  Since H5detect is run once to generate H5Tinit.c,
it does not matter that much if it is optimized or not.


Platforms tested:
"h5committested".
Tested in Titan too.