LibJS: Add "name" property to functions

Author: https://github.com/linusg
Commit: 99be27b4a1
Pull-request: https://github.com/SerenityOS/serenity/pull/2068

Libraries/LibJS/Tests/Object.js

@@ -0,0 +1,14 @@
+load("test-common.js");
+
+try {
+    assert(Object.length === 1);
+    assert(Object.name === "Object");
+    assert(Object.prototype.length === undefined);
+
+    assert(typeof Object() === "object");
+    assert(typeof new Object() === "object");
+
+    console.log("PASS");
+} catch (e) {
+    console.log("FAIL: " + e);
+}