Add --enable-wasm to wasm tests.

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 a41e6d978a89b35f7cb7ec606bc193a496ccc8c7..60ad446db42bc9758400b0de19a457b14c9af8f5 100644
--- a/test/mjsunit/wasm/wasm-object-api.js
+++ b/test/mjsunit/wasm/wasm-object-api.js
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// Flags: --expose-wasm
+
 assertFalse(undefined === WASM);
 assertFalse(undefined == WASM);
 assertEquals("function", typeof WASM.verifyModule);