Fix up objc_msgSend selector stubs in Binary Ninja

binja_stripped_selector_stub_fixup.py

for function in filter(lambda f: f.name == "_objc_msgSend", bv.functions):
	selector = function.lowest_address + 4
	selector = list(bv.get_code_refs_from(selector))[0]
	selector = list(bv.get_data_refs(selector))[0]
	selector = list(bv.get_data_refs_from(selector))[0]
	selector = bv.get_data_var_at(selector).value
	# objc_msgSend itself, probably
	if not selector:
		continue
	selector = selector[:-1].decode()
	function.name = f"objc_msgSend${selector}"