Modifying test-global to accomodate v8 inter-context 'global' protection.

test/fixtures/global/plain.js

@@ -1,6 +1,4 @@
 foo = "foo";
 global.bar = "bar";
 
-exports.fooBar = function () {
-  return {foo: global.foo, bar: bar};
-};
+exports.fooBar = {foo: global.foo, bar:bar};

test/simple/test-global.js

@@ -9,7 +9,7 @@ assert.equal("foo", global.baseFoo, "x -> global.x in base level not working");
 assert.equal("bar", baseBar, "global.x -> x in base level not working");
 
 var module = require("../fixtures/global/plain"),
-  fooBar = module.fooBar();
+  fooBar = module.fooBar;
 
 assert.equal("foo", fooBar.foo, "x -> global.x in sub level not working");