[hl] Fix debug assigns not sorted when not optimize

[yuxiaomao]

When the optimization is effective, fun.assigns are sorted correctly in ascending order. When no optimization or optimization is not needed in a inner function, arg (-1) seems to be placed before captured var (-2), which cause debugger not treating them correctly.

haxe/src/generators/hlopt.ml

Lines 618 to 619 in 79e018d

	let new_assigns = List.sort (fun (_,p1) (_,p2) -> p1 - p2) (List.rev new_assigns) in
	assigns := Array.of_list new_assigns;

Tests in

• [CI] add tests for assigns sort vshaxe/hashlink-debugger#137