Ternary operator in lib/am files.

Ternary operator in lib/am files.

	* automake.in (&transform_token): New.
	(&transform): Use it.
	Support %KEY?TRUE:FALSE%.
	(&make_paragraphs): Adjust the regexp to call %transform.
	* lib/am/data.am, lib/am/libs.am, lib/am/lisp.am, lib/am/ltlib.am,
	* lib/am/progs.am, lib/am/python.am, lib/am/scripts.am:
	Use %KEY?TRUE:FALSE%.
	* lib/am/inst-vars.am (am__strip_dir): Assign the result to f
	to be more alike am__vpath_adj.
	Adjust dependencies.

Signed-off-by: Akim Demaille <akim@lrde.epita.fr>