Add native compiler dynamic scope support

Add an initial implementation to support dynamic scope.  Arg
parsing/binding it's done using the existing code in use for
bytecode (no ad-hoc code is synthetized for that).

	* src/lisp.h (struct Lisp_Subr): Add lambda_list field.
	(SUBR_NATIVE_COMPILED_DYNP): New inliner.

	* src/alloc.c (mark_object): Update for Add lambda_list field.

	* src/eval.c (eval_sub, Ffuncall, funcall_lambda): Handle native
	compiled dynamic scope

	* src/comp.c (declare_lex_function): Rename from declare_function
	and rework.
	(declare_function): New function.
	(make_subr): Handle daynamic scope

	* src/pdumper.c (dump_subr): Update for lambda_list field.

	* lisp/emacs-lisp/comp.el (comp-func): Remove args slot.
	(comp-func-l, comp-func-d): New classes deriving from `comp-func'.
	(comp-spill-lap-function): Rework.
	(comp-prepare-args-for-top-level): New function.
	(comp-emit-for-top-level, comp-emit-lambda-for-top-level): Make
	use of `comp-prepare-args-for-top-level'.
	(comp-limplify-top-level): Use `comp-func-l'.
	(comp-limplify-function): Emit arg prologue only for dynamic
	scoped functions.
	(comp-call-optim-form-call): Use `comp-func-l'.
	(comp-call-optim, comp-tco): Do not optimize dynamic scoped code.

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