[wasm] Add support for exporting WebAssembly.Table instances.

test/mjsunit/wasm/wasm-module-builder.js

Index: test/mjsunit/wasm/wasm-module-builder.js
diff --git a/test/mjsunit/wasm/wasm-module-builder.js b/test/mjsunit/wasm/wasm-module-builder.js
index e3311c1cb620f8d798b9a6a8120e0c189c295768..5277804cbd1f8c14ad21aed598b2d14f14de8cf0 100644
--- a/test/mjsunit/wasm/wasm-module-builder.js
+++ b/test/mjsunit/wasm/wasm-module-builder.js
@@ -207,6 +207,11 @@ class WasmModuleBuilder {
     return this;
   }
 
+  addExportOfKind(name, kind, index) {
+    this.exports.push({name: name, kind: kind, index: index});
+    return this;
+  }
+
   addDataSegment(addr, data, is_global = false) {
     this.segments.push({addr: addr, data: data, is_global: is_global});
     return this.segments.length - 1;