[JSC] Add missing name property for %IntlSegmentsPrototype%[%Symbol.iterator%]

https://bugs.webkit.org/show_bug.cgi?id=296801

Reviewed by NOBODY (OOPS!).

This patch changes to implement tc39/ecma402#1015

* Source/JavaScriptCore/runtime/IntlSegmentsPrototype.cpp:
(JSC::IntlSegmentsPrototype::finishCreation):

Author: sosukesuzuki

JSTests/stress/intl-segments-prototype-symbol-iterator-name.js

@@ -0,0 +1,10 @@
+function shouldBe(a, b) {
+    if (a !== b)
+        throw new Error(`Expected ${b} but got ${a}`);
+}
+
+s = new Intl.Segmenter()
+ss = s.segment("123")
+const iteratorFnName = ss[Symbol.iterator].name
+
+shouldBe(iteratorFnName, "[Symbol.iterator]");

Source/JavaScriptCore/runtime/IntlSegmentsPrototype.cpp

@@ -69,7 +69,8 @@ void IntlSegmentsPrototype::finishCreation(VM& vm, JSGlobalObject* globalObject)
 {
     Base::finishCreation(vm);
     ASSERT(inherits(info()));
-    JSC_NATIVE_FUNCTION_WITHOUT_TRANSITION(vm.propertyNames->iteratorSymbol, intlSegmentsPrototypeFuncIterator, static_cast<unsigned>(PropertyAttribute::DontEnum), 0, ImplementationVisibility::Public);
+    JSFunction* iteratorFunction = JSFunction::create(vm, globalObject, 0, "[Symbol.iterator]"_s, intlSegmentsPrototypeFuncIterator, ImplementationVisibility::Public);
+    putDirectWithoutTransition(vm, vm.propertyNames->iteratorSymbol, iteratorFunction, static_cast<unsigned>(PropertyAttribute::DontEnum));
 }
 
 // https://tc39.es/proposal-intl-segmenter/#sec-%segmentsprototype%.containing