LibJS: Fix rest-params test to take function hoisting into account

Libraries/LibJS/Tests/function-rest-params.js

@@ -7,7 +7,7 @@ try {
     }
     foo();
 
-    function foo(...a) {
+    function foo1(...a) {
         assert(a instanceof Array);
         assert(a.length === 4);
         assert(a[0] === "foo");
@@ -15,17 +15,17 @@ try {
         assert(a[2] === undefined);
         assert(a[3].foo === "bar");
     }
-    foo("foo", 123, undefined, { foo: "bar" });
+    foo1("foo", 123, undefined, { foo: "bar" });
 
-    function foo(a, b, ...c) {
+    function foo2(a, b, ...c) {
         assert(a === "foo");
         assert(b === 123);
         assert(c instanceof Array);
         assert(c.length === 0);
     }
-    foo("foo", 123);
+    foo2("foo", 123);
 
-    function foo(a, b, ...c) {
+    function foo3(a, b, ...c) {
         assert(a === "foo");
         assert(b === 123);
         assert(c instanceof Array);
@@ -33,7 +33,7 @@ try {
         assert(c[0] === undefined);
         assert(c[1].foo === "bar");
     }
-    foo("foo", 123, undefined, { foo: "bar" });
+    foo3("foo", 123, undefined, { foo: "bar" });
 
     var foo = (...a) => {
         assert(a instanceof Array);