[wasm][asm.js] Allow a function to be exported more than once.

test/mjsunit/wasm/asm-wasm.js

Index: test/mjsunit/wasm/asm-wasm.js
diff --git a/test/mjsunit/wasm/asm-wasm.js b/test/mjsunit/wasm/asm-wasm.js
index d0df4828fa0f07a0191c89fb7ee7ffa60718228b..0507b128c37840e2edf7633bae92415a4ad575ea 100644
--- a/test/mjsunit/wasm/asm-wasm.js
+++ b/test/mjsunit/wasm/asm-wasm.js
@@ -1675,3 +1675,17 @@ function TestFloatGlobals(stdlib) {
 }
 
 assertWasm(3.25, TestFloatGlobals);
+
+
+(function TestExportTwice() {
+  function asmModule() {
+    "use asm";
+    function foo() {
+      return 42;
+    }
+    return {bar: foo, baz: foo};
+  }
+  var m = asmModule();
+  assertEquals(42, m.bar());
+  assertEquals(42, m.baz());
+})();