2012-03-20  Arnaud Charlet  <charlet@adacore.com>

	* hlo.ads, hlo.adb: Removed, no longer used.
	* gcc-interface/Make-lang.in: Remove hlo.o. Update dependencies.
	* gcc-interface/Makefile.in: Remove EXTRA_LIBGNAT_SRCS (temporarly)
	and compute it from EXTRA_LIBGNAT_OBJS.
	Clean up comments, reorder LIBGNAT_SRCS and LIBGNAT_OBJS.

From-SVN: r185565