check-lib-deps: better heuristics for inner directories.
check-lib-deps: better heuristics for inner directories.

	* scripts/check-lib-deps (&directory_inner): New.
	Use it instead of &prefix.

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