builtins.c (dummy_object, [...]): Move to gimplify.c.

builtins.c (dummy_object, [...]): Move to gimplify.c.

	* builtins.c (dummy_object, gimplify_va_arg_expr): Move to gimplify.c.
	* gimplify.c (build_va_arg_indirect_ref, std_gimplify_va_arg_expr):
	Move to targhooks.c.
	(dummy_object, gimplify_va_arg_expr): Relocate from builtins.c.
	* targhooks.c (build_va_arg_indirect_ref, std_gimplify_va_arg_expr):
	Relocate from gimplify.c.
	* targhooks.h: Add 2 prototypes.
	* tree.h. Delete 2 prototypes.

From-SVN: r204032