add support for import.meta.url to jsc CLI

https://bugs.webkit.org/show_bug.cgi?id=296132
rdar://156071047

Reviewed by NOBODY (OOPS!).

This patch adds import.meta.url to the JSC CLI and API module import.meta objects. This
matches the web's behavior and is desired for WebKit/JetStream#73.

Author: kmiller68

JSTests/stress/import-meta-url.mjs

@@ -0,0 +1,2 @@
+if (!import.meta.url.match("import-meta-url.mjs"))
+    throw new Error("import.meta.url doesn't seem right: " + import.meta.url);

Source/JavaScriptCore/jsc.cpp

@@ -1527,6 +1527,9 @@ JSObject* GlobalObject::moduleLoaderCreateImportMetaProperties(JSGlobalObject* g
     metaProperties->putDirect(vm, Identifier::fromString(vm, "filename"_s), key);
     RETURN_IF_EXCEPTION(scope, nullptr);
 
+    metaProperties->putDirect(vm, JSC::Identifier::fromString(vm, "url"_s), key);
+    RETURN_IF_EXCEPTION(scope, nullptr);
+
     return metaProperties;
 }