vchoi_fork

[svn-r18492] Bug fix:
Testlibinfo.sh failed again.

Solution:
Removed the const from H5libhdf5_settings definition, again.
Revamp the whole setting so that H5lib_settings.c is compiled
individually, just like H5Tinit.c.  Hope this will take care
of the problem once for all.

Tested:
Jam using --disable-shared with --enable and --disable-embedded-libinfo.
Will test this on the AIX platform after commit (cannot run bin/reconfigure
in the AIX platform and it is too clumsy to try to ssh files back and forth
and incurred "svn merge inconsistency" later too.
Pretty confident this fix should work in all other platforms.