Fix invalid syntax for JS setters in tests

LayoutTests/inspector/console/console-eval-scoped-expected.txt

 CONSOLE MESSAGE: line 4: with: Object property value
 CONSOLE MESSAGE: line 1: eval in with: Object property value
 CONSOLE MESSAGE: line 1: eval in function: Function parameter
 Tests that evaluating 'console.log()' in the console will have access to its outer scope variables. Bug 60547.
 
 
 Running: testSnippet1
 with: Object property value VM:4
 eval in with: Object property value VM:1
 
@@ skipping 23 matching lines @@
 {
     configurable : true
     enumerable : true
     get : {
         type : "undefined"
     }
     isOwn : true
     name : "setter"
     set : {
         className : "Object"
-        description : "function setter() { }"
+        description : "function setter(_) { }"
         objectId : <string>
         type : "function"
     }
 }
 {
     configurable : true
     enumerable : true
     isOwn : true
     name : "baz"
     value : {
@@ skipping 13 matching lines @@
         objectId : <string>
         type : "object"
     }
     writable : true
 }
 
 Running: testGetEventListenersDoesNotThrow
 getEventListeners(document.body.firstChild)
 Object {}