[wasm] Rename the WASM object to _WASMEXP_.

test/mjsunit/wasm/wasm-object-api.js

Index: test/mjsunit/wasm/wasm-object-api.js
diff --git a/test/mjsunit/wasm/wasm-object-api.js b/test/mjsunit/wasm/wasm-object-api.js
index 60ad446db42bc9758400b0de19a457b14c9af8f5..1dfbb6522e410c5d8475de964a1e5fec2a6ff4db 100644
--- a/test/mjsunit/wasm/wasm-object-api.js
+++ b/test/mjsunit/wasm/wasm-object-api.js
@@ -4,8 +4,8 @@
 
 // Flags: --expose-wasm
 
-assertFalse(undefined === WASM);
-assertFalse(undefined == WASM);
-assertEquals("function", typeof WASM.verifyModule);
-assertEquals("function", typeof WASM.verifyFunction);
-assertEquals("function", typeof WASM.compileRun);
+assertFalse(undefined === _WASMEXP_);
+assertFalse(undefined == _WASMEXP_);
+assertEquals("function", typeof _WASMEXP_.verifyModule);
+assertEquals("function", typeof _WASMEXP_.verifyFunction);
+assertEquals("function", typeof _WASMEXP_.compileRun);