hdf5_der

[svn-r27270] Changes that allow the autotools to correctly deal with inline
functions.

- Inline markup schemes are now checked with AC_COMPILE_IFELSE
  tests instead of AC_C_INLINE.

- The inline designator is now H5_INLINE instead of H5_inline.
  This is now set in H5private.h instead of H5pubconf.h.

Tested on 64-bit linux VM