bf: msvc: nuke some useless copies
bf: msvc: nuke some useless copies

	* buildfarm/make-installer: Ask "merge-install.sh" to work
	directly into DIR_PACKAGES.
	(tmp): Useless, remove.

urbiforge/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,urbiforge/urbi,aldebaran/urbi,aldebaran/urbi,aldebaran/urbi,aldebaran/urbi,urbiforge/urbi,aldebaran/urbi