[wasm] Support validation of asm.js modules with != 3 args.

src/runtime/runtime.h

Index: src/runtime/runtime.h
diff --git a/src/runtime/runtime.h b/src/runtime/runtime.h
index 99525010b70a2d55863b5b09684cf77a082b6865..56dd9316894952ca6954625874010375480dc073 100644
--- a/src/runtime/runtime.h
+++ b/src/runtime/runtime.h
@@ -883,7 +883,8 @@ namespace internal {
   F(HasFixedUint8ClampedElements, 1, 1)       \
   F(SpeciesProtector, 0, 1)                   \
   F(SerializeWasmModule, 1, 1)                \
-  F(DeserializeWasmModule, 1, 1)
+  F(DeserializeWasmModule, 1, 1)              \
+  F(IsAsmWasmCode, 1, 1)
 
 #define FOR_EACH_INTRINSIC_TYPEDARRAY(F)     \
   F(ArrayBufferGetByteLength, 1, 1)          \