Update JS-test generation after WebAssembly#90 and WebAssembly#92 (WebAssembly#94)

"index" was renamed to "address". Without this change, all JS tests
generated from the core tests will fail.

Author: backes

interpreter/script/js.ml

@@ -37,9 +37,9 @@ let spectest = {
   global_f64: 666.6,
   table: new WebAssembly.Table({initial: 10, maximum: 20, element: 'anyfunc'}),
   table64: new WebAssembly.Table(
-    {initial: 10n, maximum: 20n, element: 'anyfunc', index: 'i64'}),
+    {initial: 10n, maximum: 20n, element: 'anyfunc', address: 'i64'}),
   memory: new WebAssembly.Memory({initial: 1, maximum: 2}),
-  memory64: new WebAssembly.Memory({initial: 1n, maximum: 2n, index: 'i64'})
+  memory64: new WebAssembly.Memory({initial: 1n, maximum: 2n, address: 'i64'})
 };
 
 let handler = {